78979745079 has 12 divisors (see below), whose sum is σ = 114571478736. Its totient is φ = 52427182752.

The previous prime is 78979745063. The next prime is 78979745081. The reversal of 78979745079 is 97054797987.

78979745079 is a `hidden beast` number, since 7 + 89 + 7 + 97 + 450 + 7 + 9 = 666.

It is not a de Polignac number, because 78979745079 - 2⁴ = 78979745063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78979744998 and 78979745016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78979755079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18829507 + ... + 18833700.

It is an arithmetic number, because the mean of its divisors is an integer number (9547623228).

Almost surely, 2^78979745079 is an apocalyptic number.

78979745079 is a deficient number, since it is larger than the sum of its proper divisors (35591733657).

78979745079 is a wasteful number, since it uses less digits than its factorization.

78979745079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37663446 (or 37663443 counting only the distinct ones).

The product of its (nonzero) digits is 280052640, while the sum is 72.

The spelling of 78979745079 in words is "seventy-eight billion, nine hundred seventy-nine million, seven hundred forty-five thousand, seventy-nine".