634642155960 has 32 divisors (see below), whose sum is σ = 1903926468240. Its totient is φ = 169237908224.

The previous prime is 634642155947. The next prime is 634642155971. The reversal of 634642155960 is 69551246436.

It is a super-2 number, since 2×634642155960² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2644342197 + ... + 2644342436.

Almost surely, 2^634642155960 is an apocalyptic number.

634642155960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634642155960 is an abundant number, since it is smaller than the sum of its proper divisors (1269284312280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634642155960 is a wasteful number, since it uses less digits than its factorization.

634642155960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288684647 (or 5288684643 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 51.

The spelling of 634642155960 in words is "six hundred thirty-four billion, six hundred forty-two million, one hundred fifty-five thousand, nine hundred sixty".