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1081980669 = 371121973307
BaseRepresentation
bin100000001111101…
…1011011011111101
32210101221022110010
41000133123123331
54203441340134
6255210333433
735545453410
oct10037333375
92711838403
101081980669
11505828100
1226242a279
13143211c63
14a39abb77
1564ec6ce9
hex407db6fd

1081980669 has 96 divisors (see below), whose sum is σ = 1940055040. Its totient is φ = 523480320.

The previous prime is 1081980661. The next prime is 1081980671. The reversal of 1081980669 is 9660891801.

It is not a de Polignac number, because 1081980669 - 23 = 1081980661 is a prime.

It is a super-2 number, since 2×10819806692 = 2341364336179375122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081980661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3524214 + ... + 3524520.

Almost surely, 21081980669 is an apocalyptic number.

1081980669 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1081980669 is a deficient number, since it is larger than the sum of its proper divisors (858074371).

1081980669 is a wasteful number, since it uses less digits than its factorization.

1081980669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 1081980669 is about 32893.4745656338. The cubic root of 1081980669 is about 1026.6123880034.

The spelling of 1081980669 in words is "one billion, eighty-one million, nine hundred eighty thousand, six hundred sixty-nine".

Divisors: 1 3 7 11 19 21 33 57 73 77 121 133 209 219 231 307 363 399 511 627 803 847 921 1387 1463 1533 2149 2299 2409 2541 3377 4161 4389 5621 5833 6447 6897 8833 9709 10131 15257 16093 16863 17499 22411 23639 26499 29127 37147 40831 45771 48279 61831 64163 67233 70917 106799 111441 122493 156877 167827 185493 192489 246521 260029 320397 425809 449141 470631 503481 705793 739563 780087 1174789 1277427 1347423 1725647 2117379 2711731 2980663 3524367 4683899 4940551 5176941 8135193 8941989 14051697 14821653 18982117 32787293 51522889 56946351 98361879 154568667 360660223 1081980669