264638629431 has 18 divisors (see below), whose sum is σ = 420165465720. Its totient is φ = 160387047480.

The previous prime is 264638629427. The next prime is 264638629447. The reversal of 264638629431 is 134926836462.

264638629431 is a `hidden beast` number, since 2 + 6 + 4 + 6 + 3 + 8 + 629 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 264638629431 - 2² = 264638629427 is a prime.

It is a super-2 number, since 2×264638629431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264638629331) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 121504251 + ... + 121506428.

Almost surely, 2^264638629431 is an apocalyptic number.

264638629431 is a deficient number, since it is larger than the sum of its proper divisors (155526836289).

264638629431 is a wasteful number, since it uses less digits than its factorization.

264638629431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243010707 (or 243010693 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 54.

The spelling of 264638629431 in words is "two hundred sixty-four billion, six hundred thirty-eight million, six hundred twenty-nine thousand, four hundred thirty-one".