78331185892 has 12 divisors (see below), whose sum is σ = 137212540416. Its totient is φ = 39127602920.

The previous prime is 78331185871. The next prime is 78331185917. The reversal of 78331185892 is 29858113387.

It is a super-2 number, since 2×78331185892² (a number of 23 digits) contains 22 as substring.

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, 9492868 + ... + 9501115.

It is an arithmetic number, because the mean of its divisors is an integer number (11434378368).

Almost surely, 2^78331185892 is an apocalyptic number.

It is an amenable number.

78331185892 is a deficient number, since it is larger than the sum of its proper divisors (58881354524).

78331185892 is a wasteful number, since it uses less digits than its factorization.

78331185892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18995018 (or 18995016 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The spelling of 78331185892 in words is "seventy-eight billion, three hundred thirty-one million, one hundred eighty-five thousand, eight hundred ninety-two".