64634564631 has 32 divisors (see below), whose sum is σ = 106542714880. Its totient is φ = 33940041984.

The previous prime is 64634564569. The next prime is 64634564633. The reversal of 64634564631 is 13646543646.

It is a happy number.

It is not a de Polignac number, because 64634564631 - 2⁷ = 64634564503 is a prime.

It is a super-2 number, since 2×64634564631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64634564633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469966 + ... + 591723.

It is an arithmetic number, because the mean of its divisors is an integer number (3329459840).

Almost surely, 2^64634564631 is an apocalyptic number.

64634564631 is a deficient number, since it is larger than the sum of its proper divisors (41908150249).

64634564631 is a wasteful number, since it uses less digits than its factorization.

64634564631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061935.

The product of its digits is 3732480, while the sum is 48.

The spelling of 64634564631 in words is "sixty-four billion, six hundred thirty-four million, five hundred sixty-four thousand, six hundred thirty-one".