64707661128 has 64 divisors (see below), whose sum is σ = 177214003200. Its totient is φ = 19526319680.

The previous prime is 64707661091. The next prime is 64707661157. The reversal of 64707661128 is 82116670746.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449676 + ... + 575867.

It is an arithmetic number, because the mean of its divisors is an integer number (2768968800).

Almost surely, 2^64707661128 is an apocalyptic number.

It is an amenable number.

64707661128 is an abundant number, since it is smaller than the sum of its proper divisors (112506342072).

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

64707661128 is a wasteful number, since it uses less digits than its factorization.

64707661128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025802 (or 1025798 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 64707661128 in words is "sixty-four billion, seven hundred seven million, six hundred sixty-one thousand, one hundred twenty-eight".