78364745979 has 32 divisors (see below), whose sum is σ = 115265762304. Its totient is φ = 47051746560.

The previous prime is 78364745971. The next prime is 78364746001. The reversal of 78364745979 is 97954746387.

It is not a de Polignac number, because 78364745979 - 2³ = 78364745971 is a prime.

It is a super-2 number, since 2×78364745979² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78364745971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1546414 + ... + 1596284.

It is an arithmetic number, because the mean of its divisors is an integer number (3602055072).

Almost surely, 2^78364745979 is an apocalyptic number.

78364745979 is a deficient number, since it is larger than the sum of its proper divisors (36901016325).

78364745979 is a wasteful number, since it uses less digits than its factorization.

78364745979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50867.

The product of its digits is 320060160, while the sum is 69.

The spelling of 78364745979 in words is "seventy-eight billion, three hundred sixty-four million, seven hundred forty-five thousand, nine hundred seventy-nine".