78502775099 has 12 divisors (see below), whose sum is σ = 92223714528. Its totient is φ = 66621870000.

The previous prime is 78502775069. The next prime is 78502775111. The reversal of 78502775099 is 99057720587.

It is a de Polignac number, because none of the positive numbers 2^k-78502775099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78502775069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7926227 + ... + 7936124.

It is an arithmetic number, because the mean of its divisors is an integer number (7685309544).

Almost surely, 2^78502775099 is an apocalyptic number.

78502775099 is a deficient number, since it is larger than the sum of its proper divisors (13720939429).

78502775099 is a wasteful number, since it uses less digits than its factorization.

78502775099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15862466 (or 15862459 counting only the distinct ones).

The product of its (nonzero) digits is 11113200, while the sum is 59.

The spelling of 78502775099 in words is "seventy-eight billion, five hundred two million, seven hundred seventy-five thousand, ninety-nine".