78520502079 has 36 divisors (see below), whose sum is σ = 119074685184. Its totient is φ = 49855443264.

The previous prime is 78520502063. The next prime is 78520502119. The reversal of 78520502079 is 97020502587.

It is a happy number.

78520502079 is a `hidden beast` number, since 7 + 8 + 520 + 50 + 2 + 0 + 79 = 666.

It is not a de Polignac number, because 78520502079 - 2⁴ = 78520502063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78520502059) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1073922 + ... + 1144704.

It is an arithmetic number, because the mean of its divisors is an integer number (3307630144).

Almost surely, 2^78520502079 is an apocalyptic number.

78520502079 is a deficient number, since it is larger than the sum of its proper divisors (40554183105).

78520502079 is a wasteful number, since it uses less digits than its factorization.

78520502079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71068 (or 71042 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 78520502079 in words is "seventy-eight billion, five hundred twenty million, five hundred two thousand, seventy-nine".