78574579291 has 12 divisors (see below), whose sum is σ = 85212947160. Its totient is φ = 72420216960.

The previous prime is 78574579261. The next prime is 78574579333. The reversal of 78574579291 is 19297547587.

It is not a de Polignac number, because 78574579291 - 2¹⁷ = 78574448219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78574579261) 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, 241390 + ... + 464131.

It is an arithmetic number, because the mean of its divisors is an integer number (7101078930).

Almost surely, 2^78574579291 is an apocalyptic number.

78574579291 is a deficient number, since it is larger than the sum of its proper divisors (6638367869).

78574579291 is a wasteful number, since it uses less digits than its factorization.

78574579291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706206 (or 706193 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 64.

The spelling of 78574579291 in words is "seventy-eight billion, five hundred seventy-four million, five hundred seventy-nine thousand, two hundred ninety-one".