64178063900668 has 48 divisors (see below), whose sum is σ = 116068800282624. Its totient is φ = 31017952667520.

The previous prime is 64178063900651. The next prime is 64178063900669. The reversal of 64178063900668 is 86600936087146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64178063900669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1915574805 + ... + 1915608307.

It is an arithmetic number, because the mean of its divisors is an integer number (2418100005888).

Almost surely, 2^{64178063900668} is an apocalyptic number.

It is an amenable number.

64178063900668 is a deficient number, since it is larger than the sum of its proper divisors (51890736381956).

64178063900668 is a wasteful number, since it uses less digits than its factorization.

64178063900668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50962 (or 50960 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 64.

The spelling of 64178063900668 in words is "sixty-four trillion, one hundred seventy-eight billion, sixty-three million, nine hundred thousand, six hundred sixty-eight".