78700974165 has 80 divisors (see below), whose sum is σ = 162004518720. Its totient is φ = 36149690880.

The previous prime is 78700974151. The next prime is 78700974167. The reversal of 78700974165 is 56147900787.

78700974165 is a `hidden beast` number, since 78 + 70 + 0 + 97 + 416 + 5 = 666.

It is not a de Polignac number, because 78700974165 - 2⁵ = 78700974133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78700974167) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 380244 + ... + 549533.

It is an arithmetic number, because the mean of its divisors is an integer number (2025056484).

Almost surely, 2^78700974165 is an apocalyptic number.

It is an amenable number.

78700974165 is an abundant number, since it is smaller than the sum of its proper divisors (83303544555).

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

78700974165 is a wasteful number, since it uses less digits than its factorization.

78700974165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929824 (or 929815 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 78700974165 in words is "seventy-eight billion, seven hundred million, nine hundred seventy-four thousand, one hundred sixty-five".