634439062664 has 64 divisors (see below), whose sum is σ = 1303219272960. Its totient is φ = 287160906240.

The previous prime is 634439062643. The next prime is 634439062693. The reversal of 634439062664 is 466260934436.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21849884 + ... + 21878900.

It is an arithmetic number, because the mean of its divisors is an integer number (20362801140).

Almost surely, 2^634439062664 is an apocalyptic number.

It is an amenable number.

634439062664 is an abundant number, since it is smaller than the sum of its proper divisors (668780210296).

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

634439062664 is a wasteful number, since it uses less digits than its factorization.

634439062664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30078 (or 30074 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 53.

The spelling of 634439062664 in words is "six hundred thirty-four billion, four hundred thirty-nine million, sixty-two thousand, six hundred sixty-four".