79923844386 has 48 divisors (see below), whose sum is σ = 179291207160. Its totient is φ = 25700855040.

The previous prime is 79923844373. The next prime is 79923844393. The reversal of 79923844386 is 68344832997.

79923844386 is a `hidden beast` number, since 7 + 99 + 23 + 8 + 443 + 86 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 78473377161 + 1450467225 = 280131^2 + 38085^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 558576 + ... + 686916.

Almost surely, 2^79923844386 is an apocalyptic number.

79923844386 is an abundant number, since it is smaller than the sum of its proper divisors (99367362774).

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

79923844386 is a wasteful number, since it uses less digits than its factorization.

79923844386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129571 (or 129568 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 79923844386 in words is "seventy-nine billion, nine hundred twenty-three million, eight hundred forty-four thousand, three hundred eighty-six".