78042122892 has 48 divisors (see below), whose sum is σ = 207266354400. Its totient is φ = 25379550720.

The previous prime is 78042122863. The next prime is 78042122927. The reversal of 78042122892 is 29822124087.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8807917 + ... + 8816772.

It is an arithmetic number, because the mean of its divisors is an integer number (4318049050).

Almost surely, 2^78042122892 is an apocalyptic number.

It is an amenable number.

78042122892 is an abundant number, since it is smaller than the sum of its proper divisors (129224231508).

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

78042122892 is a wasteful number, since it uses less digits than its factorization.

78042122892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17624743 (or 17624735 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 78042122892 in words is "seventy-eight billion, forty-two million, one hundred twenty-two thousand, eight hundred ninety-two".