64531177608576 has 128 divisors (see below), whose sum is σ = 196181722978560. Its totient is φ = 18410796472320.

The previous prime is 64531177608563. The next prime is 64531177608607. The reversal of 64531177608576 is 67580677113546.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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, 15513891 + ... + 19228706.

It is an arithmetic number, because the mean of its divisors is an integer number (1532669710770).

Almost surely, 2^{64531177608576} is an apocalyptic number.

It is an amenable number.

64531177608576 is an abundant number, since it is smaller than the sum of its proper divisors (131650545369984).

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

64531177608576 is a wasteful number, since it uses less digits than its factorization.

64531177608576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34743312 (or 34743300 counting only the distinct ones).

The product of its (nonzero) digits is 177811200, while the sum is 66.

The spelling of 64531177608576 in words is "sixty-four trillion, five hundred thirty-one billion, one hundred seventy-seven million, six hundred eight thousand, five hundred seventy-six".