64758586816 has 56 divisors (see below), whose sum is σ = 160214438016. Its totient is φ = 25230616320.

The previous prime is 64758586769. The next prime is 64758586861. The reversal of 64758586816 is 61868585746.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6565546 + ... + 6575401.

Almost surely, 2^64758586816 is an apocalyptic number.

It is an amenable number.

64758586816 is an abundant number, since it is smaller than the sum of its proper divisors (95455851200).

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

64758586816 is a wasteful number, since it uses less digits than its factorization.

64758586816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13140977 (or 13140967 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 64.

The spelling of 64758586816 in words is "sixty-four billion, seven hundred fifty-eight million, five hundred eighty-six thousand, eight hundred sixteen".