64579251672 has 80 divisors (see below), whose sum is σ = 194795702640. Its totient is φ = 19870536384.

The previous prime is 64579251647. The next prime is 64579251683. The reversal of 64579251672 is 27615297546.

It is a happy number.

64579251672 is a `hidden beast` number, since 6 + 4 + 57 + 9 + 2 + 516 + 72 = 666.

64579251672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3824628 + ... + 3841475.

It is an arithmetic number, because the mean of its divisors is an integer number (2434946283).

Almost surely, 2^64579251672 is an apocalyptic number.

It is an amenable number.

64579251672 is an abundant number, since it is smaller than the sum of its proper divisors (130216450968).

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

64579251672 is a wasteful number, since it uses less digits than its factorization.

64579251672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666134 (or 7666121 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The spelling of 64579251672 in words is "sixty-four billion, five hundred seventy-nine million, two hundred fifty-one thousand, six hundred seventy-two".