75564323768 has 32 divisors (see below), whose sum is σ = 149153491200. Its totient is φ = 35790416352.

The previous prime is 75564323713. The next prime is 75564323801. The reversal of 75564323768 is 86732346557.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3355121 + ... + 3377567.

It is an arithmetic number, because the mean of its divisors is an integer number (4661046600).

Almost surely, 2^75564323768 is an apocalyptic number.

It is an amenable number.

75564323768 is a deficient number, since it is larger than the sum of its proper divisors (73589167432).

75564323768 is a wasteful number, since it uses less digits than its factorization.

75564323768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44619 (or 44615 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 56.

The spelling of 75564323768 in words is "seventy-five billion, five hundred sixty-four million, three hundred twenty-three thousand, seven hundred sixty-eight".