64497555936 has 96 divisors (see below), whose sum is σ = 205219526400. Its totient is φ = 19544711040.

The previous prime is 64497555907. The next prime is 64497555953. The reversal of 64497555936 is 63955579446.

64497555936 is a `hidden beast` number, since 6 + 4 + 4 + 9 + 75 + 559 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 3383676 + ... + 3402683.

It is an arithmetic number, because the mean of its divisors is an integer number (2137703400).

Almost surely, 2^64497555936 is an apocalyptic number.

64497555936 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

64497555936 is an abundant number, since it is smaller than the sum of its proper divisors (140721970464).

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

64497555936 is a wasteful number, since it uses less digits than its factorization.

64497555936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6786389 (or 6786375 counting only the distinct ones).

The product of its digits is 122472000, while the sum is 63.

The spelling of 64497555936 in words is "sixty-four billion, four hundred ninety-seven million, five hundred fifty-five thousand, nine hundred thirty-six".