79437866438 has 24 divisors (see below), whose sum is σ = 137166421392. Its totient is φ = 33799758192.

The previous prime is 79437866381. The next prime is 79437866461. The reversal of 79437866438 is 83466873497.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123656 + ... + 417332.

It is an arithmetic number, because the mean of its divisors is an integer number (5715267558).

Almost surely, 2^79437866438 is an apocalyptic number.

79437866438 is a deficient number, since it is larger than the sum of its proper divisors (57728554954).

79437866438 is a wasteful number, since it uses less digits than its factorization.

79437866438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293964 (or 293825 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 65.

The spelling of 79437866438 in words is "seventy-nine billion, four hundred thirty-seven million, eight hundred sixty-six thousand, four hundred thirty-eight".