12791323478775 has 96 divisors (see below), whose sum is σ = 21911311872000. Its totient is φ = 6577564032000.

The previous prime is 12791323478749. The next prime is 12791323478789. The reversal of 12791323478775 is 57787432319721.

It is not a de Polignac number, because 12791323478775 - 2¹⁵ = 12791323446007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2182444345 + ... + 2182450205.

It is an arithmetic number, because the mean of its divisors is an integer number (228242832000).

Almost surely, 2^{12791323478775} is an apocalyptic number.

12791323478775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12791323478775 is a deficient number, since it is larger than the sum of its proper divisors (9119988393225).

12791323478775 is a wasteful number, since it uses less digits than its factorization.

12791323478775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9217 (or 9212 counting only the distinct ones).

The product of its digits is 124467840, while the sum is 66.

The spelling of 12791323478775 in words is "twelve trillion, seven hundred ninety-one billion, three hundred twenty-three million, four hundred seventy-eight thousand, seven hundred seventy-five".