64657786374 has 48 divisors (see below), whose sum is σ = 140702994432. Its totient is φ = 21458734704.

The previous prime is 64657786363. The next prime is 64657786387. The reversal of 64657786374 is 47368775646.

64657786374 is a `hidden beast` number, since 64 + 65 + 77 + 86 + 374 = 666.

64657786374 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 5426107 + ... + 5438009.

It is an arithmetic number, because the mean of its divisors is an integer number (2931312384).

Almost surely, 2^64657786374 is an apocalyptic number.

64657786374 is an abundant number, since it is smaller than the sum of its proper divisors (76045208058).

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

64657786374 is a wasteful number, since it uses less digits than its factorization.

64657786374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13201 (or 13198 counting only the distinct ones).

The product of its digits is 142248960, while the sum is 63.

The spelling of 64657786374 in words is "sixty-four billion, six hundred fifty-seven million, seven hundred eighty-six thousand, three hundred seventy-four".