634992364257 has 16 divisors (see below), whose sum is σ = 852882733632. Its totient is φ = 420215454720.

The previous prime is 634992364247. The next prime is 634992364271. The reversal of 634992364257 is 752463299436.

It is not a de Polignac number, because 634992364257 - 2⁸ = 634992364001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634992364257.

It is not an unprimeable number, because it can be changed into a prime (634992364207) 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, 11217138 + ... + 11273604.

It is an arithmetic number, because the mean of its divisors is an integer number (53305170852).

Almost surely, 2^634992364257 is an apocalyptic number.

It is an amenable number.

634992364257 is a deficient number, since it is larger than the sum of its proper divisors (217890369375).

634992364257 is a wasteful number, since it uses less digits than its factorization.

634992364257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83968.

The product of its digits is 58786560, while the sum is 60.

The spelling of 634992364257 in words is "six hundred thirty-four billion, nine hundred ninety-two million, three hundred sixty-four thousand, two hundred fifty-seven".