64403747137164 has 96 divisors (see below), whose sum is σ = 161850172135680. Its totient is φ = 19871950537728.

The previous prime is 64403747137117. The next prime is 64403747137181. The reversal of 64403747137164 is 46173174730446.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16300809 + ... + 19862624.

It is an arithmetic number, because the mean of its divisors is an integer number (1685939293080).

Almost surely, 2^{64403747137164} is an apocalyptic number.

It is an amenable number.

64403747137164 is an abundant number, since it is smaller than the sum of its proper divisors (97446424998516).

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

64403747137164 is a wasteful number, since it uses less digits than its factorization.

64403747137164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36163639 (or 36163637 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 57.

The spelling of 64403747137164 in words is "sixty-four trillion, four hundred three billion, seven hundred forty-seven million, one hundred thirty-seven thousand, one hundred sixty-four".