64957601712 has 30 divisors (see below), whose sum is σ = 167811699468. Its totient is φ = 21651945312.

The previous prime is 64957601707. The next prime is 64957601713. The reversal of 64957601712 is 21710675946.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (64957601713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1747383 + ... + 1784169.

Almost surely, 2^64957601712 is an apocalyptic number.

It is an amenable number.

64957601712 is an abundant number, since it is smaller than the sum of its proper divisors (102854097756).

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

64957601712 is an frugal number, since it uses more digits than its factorization.

64957601712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73585 (or 36792 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 48.

Multiplying 64957601712 by its sum of digits (48), we get a square (3117964882176 = 1765776²).

64957601712 divided by its sum of digits (48) gives a square (1353283369 = 36787²).

The spelling of 64957601712 in words is "sixty-four billion, nine hundred fifty-seven million, six hundred one thousand, seven hundred twelve".