765551313 has 12 divisors (see below), whose sum is σ = 1122301648. Its totient is φ = 502749720.

The previous prime is 765551207. The next prime is 765551321. The reversal of 765551313 is 313155567.

765551313 is a `hidden beast` number, since 76 + 5 + 551 + 31 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-765551313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (765541313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 634183 + ... + 635388.

Almost surely, 2^765551313 is an apocalyptic number.

It is an amenable number.

765551313 is a deficient number, since it is larger than the sum of its proper divisors (356750335).

765551313 is a wasteful number, since it uses less digits than its factorization.

765551313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269644 (or 1269641 counting only the distinct ones).

The product of its digits is 47250, while the sum is 36.

The square root of 765551313 is about 27668.5979586968. The cubic root of 765551313 is about 914.7970776379.

The spelling of 765551313 in words is "seven hundred sixty-five million, five hundred fifty-one thousand, three hundred thirteen".