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168780650 = 2523375613
BaseRepresentation
bin10100000111101…
…10001101101010
3102202120221112012
422003312031222
5321201440100
624425315522
74116416603
oct1203661552
9382527465
10168780650
11872aa445
1248635ba2
1328c7630c
14185b6daa
15ec3e135
hexa0f636a

168780650 has 12 divisors (see below), whose sum is σ = 313932102. Its totient is φ = 67512240.

The previous prime is 168780649. The next prime is 168780653. The reversal of 168780650 is 56087861.

168780650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 115971361 + 52809289 = 10769^2 + 7267^2 .

It is a junction number, because it is equal to n+sod(n) for n = 168780598 and 168780607.

It is not an unprimeable number, because it can be changed into a prime (168780653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1687757 + ... + 1687856.

Almost surely, 2168780650 is an apocalyptic number.

168780650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168780650 is a deficient number, since it is larger than the sum of its proper divisors (145151452).

168780650 is a wasteful number, since it uses less digits than its factorization.

168780650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375625 (or 3375620 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 168780650 is about 12991.5607222535. The cubic root of 168780650 is about 552.6381792345.

The spelling of 168780650 in words is "one hundred sixty-eight million, seven hundred eighty thousand, six hundred fifty".

Divisors: 1 2 5 10 25 50 3375613 6751226 16878065 33756130 84390325 168780650