78163959785964 has 96 divisors (see below), whose sum is σ = 198442476206016. Its totient is φ = 23801833635840.

The previous prime is 78163959785927. The next prime is 78163959785969. The reversal of 78163959785964 is 46958795936187.

It is a happy number.

78163959785964 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×78163959785964² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78163959785969) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 911160754 + ... + 911246534.

It is an arithmetic number, because the mean of its divisors is an integer number (2067109127146).

Almost surely, 2^{78163959785964} is an apocalyptic number.

It is an amenable number.

78163959785964 is an abundant number, since it is smaller than the sum of its proper divisors (120278516420052).

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

78163959785964 is a wasteful number, since it uses less digits than its factorization.

78163959785964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146115 (or 146113 counting only the distinct ones).

The product of its digits is 24690355200, while the sum is 87.

The spelling of 78163959785964 in words is "seventy-eight trillion, one hundred sixty-three billion, nine hundred fifty-nine million, seven hundred eighty-five thousand, nine hundred sixty-four".