64687801028368 has 80 divisors (see below), whose sum is σ = 146572270936960. Its totient is φ = 27077894258688.

The previous prime is 64687801028321. The next prime is 64687801028387. The reversal of 64687801028368 is 86382010878646.

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, 205529296 + ... + 205843792.

It is an arithmetic number, because the mean of its divisors is an integer number (1832153386712).

Almost surely, 2^{64687801028368} is an apocalyptic number.

It is an amenable number.

64687801028368 is an abundant number, since it is smaller than the sum of its proper divisors (81884469908592).

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

64687801028368 is a wasteful number, since it uses less digits than its factorization.

64687801028368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357264 (or 357258 counting only the distinct ones).

The product of its (nonzero) digits is 148635648, while the sum is 67.

The spelling of 64687801028368 in words is "sixty-four trillion, six hundred eighty-seven billion, eight hundred one million, twenty-eight thousand, three hundred sixty-eight".