78761172315 has 64 divisors (see below), whose sum is σ = 146845135872. Its totient is φ = 35299929600.

The previous prime is 78761172293. The next prime is 78761172319. The reversal of 78761172315 is 51327116787.

It is not a de Polignac number, because 78761172315 - 2⁸ = 78761172059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78761172319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9016500 + ... + 9025230.

It is an arithmetic number, because the mean of its divisors is an integer number (2294455248).

Almost surely, 2^78761172315 is an apocalyptic number.

78761172315 is a deficient number, since it is larger than the sum of its proper divisors (68083963557).

78761172315 is a wasteful number, since it uses less digits than its factorization.

78761172315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10420.

The product of its digits is 493920, while the sum is 48.

The spelling of 78761172315 in words is "seventy-eight billion, seven hundred sixty-one million, one hundred seventy-two thousand, three hundred fifteen".