78942165172 has 48 divisors (see below), whose sum is σ = 149206176000. Its totient is φ = 36329586048.

The previous prime is 78942165119. The next prime is 78942165187. The reversal of 78942165172 is 27156124987.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent 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, 39489829 + ... + 39491827.

It is an arithmetic number, because the mean of its divisors is an integer number (3108462000).

Almost surely, 2^78942165172 is an apocalyptic number.

It is an amenable number.

78942165172 is a deficient number, since it is larger than the sum of its proper divisors (70264010828).

78942165172 is a wasteful number, since it uses less digits than its factorization.

78942165172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832 (or 3830 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 52.

The spelling of 78942165172 in words is "seventy-eight billion, nine hundred forty-two million, one hundred sixty-five thousand, one hundred seventy-two".