64334661406576 has 40 divisors (see below), whose sum is σ = 139142407244544. Its totient is φ = 28562957492160.

The previous prime is 64334661406507. The next prime is 64334661406621. The reversal of 64334661406576 is 67560416643346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4250432536 + ... + 4250447671.

Almost surely, 2^{64334661406576} is an apocalyptic number.

It is an amenable number.

64334661406576 is an abundant number, since it is smaller than the sum of its proper divisors (74807745837968).

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

64334661406576 is a wasteful number, since it uses less digits than its factorization.

64334661406576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500880269 (or 8500880263 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 61.

The spelling of 64334661406576 in words is "sixty-four trillion, three hundred thirty-four billion, six hundred sixty-one million, four hundred six thousand, five hundred seventy-six".