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80648913 = 3292573607
BaseRepresentation
bin1001100111010…
…01101011010001
312121202101111210
410303221223101
5131121231123
612000330333
71666335012
oct463515321
9177671453
1080648913
11415847a4
12230139a9
1313929867
14a9d5009
157130e93
hex4ce9ad1

80648913 has 16 divisors (see below), whose sum is σ = 111703680. Its totient is φ = 51695616.

The previous prime is 80648903. The next prime is 80648917. The reversal of 80648913 is 31984608.

It is not a de Polignac number, because 80648913 - 26 = 80648849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80648917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20556 + ... + 24162.

It is an arithmetic number, because the mean of its divisors is an integer number (6981480).

Almost surely, 280648913 is an apocalyptic number.

It is an amenable number.

80648913 is a deficient number, since it is larger than the sum of its proper divisors (31054767).

80648913 is a wasteful number, since it uses less digits than its factorization.

80648913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 80648913 is about 8980.4739852638. The cubic root of 80648913 is about 432.0488360000.

The spelling of 80648913 in words is "eighty million, six hundred forty-eight thousand, nine hundred thirteen".

Divisors: 1 3 29 87 257 771 3607 7453 10821 22359 104603 313809 926999 2780997 26882971 80648913