78502088778785 has 32 divisors (see below), whose sum is σ = 109972427846400. Its totient is φ = 53773517825664.

The previous prime is 78502088778779. The next prime is 78502088778803. The reversal of 78502088778785 is 58787788020587.

It is not a de Polignac number, because 78502088778785 - 2¹² = 78502088774689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22381247 + ... + 25650036.

It is an arithmetic number, because the mean of its divisors is an integer number (3436638370200).

Almost surely, 2^{78502088778785} is an apocalyptic number.

It is an amenable number.

78502088778785 is a deficient number, since it is larger than the sum of its proper divisors (31470339067615).

78502088778785 is an equidigital number, since it uses as much as digits as its factorization.

78502088778785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48032262 (or 48032248 counting only the distinct ones).

The product of its (nonzero) digits is 3933798400, while the sum is 80.

The spelling of 78502088778785 in words is "seventy-eight trillion, five hundred two billion, eighty-eight million, seven hundred seventy-eight thousand, seven hundred eighty-five".