64040724720 has 120 divisors (see below), whose sum is σ = 245794419936. Its totient is φ = 14637878784.

The previous prime is 64040724707. The next prime is 64040724749. The reversal of 64040724720 is 2742704046.

It is a happy number.

64040724720 is a `hidden beast` number, since 6 + 4 + 0 + 407 + 247 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6348207 + ... + 6358286.

Almost surely, 2^64040724720 is an apocalyptic number.

64040724720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64040724720 is an abundant number, since it is smaller than the sum of its proper divisors (181753695216).

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

64040724720 is a wasteful number, since it uses less digits than its factorization.

64040724720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12706519 (or 12706510 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 36.

The spelling of 64040724720 in words is "sixty-four billion, forty million, seven hundred twenty-four thousand, seven hundred twenty".