78506864005120 has 52 divisors (see below), whose sum is σ = 188393473603620. Its totient is φ = 31402745593856.

The previous prime is 78506864005057. The next prime is 78506864005201. The reversal of 78506864005120 is 2150046860587.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33659305168896 + 44847558836224 = 5801664^2 + 6696832^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916651005 + ... + 1916691964.

Almost surely, 2^{78506864005120} is an apocalyptic number.

It is an amenable number.

78506864005120 is an abundant number, since it is smaller than the sum of its proper divisors (109886609598500).

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

78506864005120 is an equidigital number, since it uses as much as digits as its factorization.

78506864005120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833342998 (or 3833342976 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 78506864005120 in words is "seventy-eight trillion, five hundred six billion, eight hundred sixty-four million, five thousand, one hundred twenty".