64178423568 has 120 divisors (see below), whose sum is σ = 211890771456. Its totient is φ = 17745177600.

The previous prime is 64178423539. The next prime is 64178423627. The reversal of 64178423568 is 86532487146.

It is a happy number.

64178423568 is a `hidden beast` number, since 6 + 4 + 1 + 78 + 4 + 2 + 3 + 568 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 995673 + ... + 1058168.

Almost surely, 2^64178423568 is an apocalyptic number.

It is an amenable number.

64178423568 is an abundant number, since it is smaller than the sum of its proper divisors (147712347888).

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

64178423568 is a wasteful number, since it uses less digits than its factorization.

64178423568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053893 (or 2053884 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 64178423568 in words is "sixty-four billion, one hundred seventy-eight million, four hundred twenty-three thousand, five hundred sixty-eight".