64537404238608 has 80 divisors (see below), whose sum is σ = 190563843002496. Its totient is φ = 18436854481920.

The previous prime is 64537404238597. The next prime is 64537404238621. The reversal of 64537404238608 is 80683240473546.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

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, 9938203 + ... + 15094458.

Almost surely, 2^{64537404238608} is an apocalyptic number.

It is an amenable number.

64537404238608 is an abundant number, since it is smaller than the sum of its proper divisors (126026438763888).

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

64537404238608 is a wasteful number, since it uses less digits than its factorization.

64537404238608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25040352 (or 25040346 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 60.

The spelling of 64537404238608 in words is "sixty-four trillion, five hundred thirty-seven billion, four hundred four million, two hundred thirty-eight thousand, six hundred eight".