78791572591 has 8 divisors (see below), whose sum is σ = 81553834800. Its totient is φ = 76032331200.

The previous prime is 78791572577. The next prime is 78791572621. The reversal of 78791572591 is 19527519787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78791572591 - 2²⁷ = 78657354863 is a prime.

It is a super-2 number, since 2×78791572591² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78791572501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702061 + ... + 806518.

It is an arithmetic number, because the mean of its divisors is an integer number (10194229350).

Almost surely, 2^78791572591 is an apocalyptic number.

78791572591 is a deficient number, since it is larger than the sum of its proper divisors (2762262209).

78791572591 is a wasteful number, since it uses less digits than its factorization.

78791572591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510409.

The product of its digits is 11113200, while the sum is 61.

The spelling of 78791572591 in words is "seventy-eight billion, seven hundred ninety-one million, five hundred seventy-two thousand, five hundred ninety-one".