12792821761 has 4 divisors (see below), whose sum is σ = 12849178032. Its totient is φ = 12736465492.

The previous prime is 12792821731. The next prime is 12792821773. The reversal of 12792821761 is 16712829721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12792821761 - 2¹⁹ = 12792297473 is a prime.

It is a super-2 number, since 2×12792821761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12792821731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28177795 + ... + 28178248.

It is an arithmetic number, because the mean of its divisors is an integer number (3212294508).

Almost surely, 2^12792821761 is an apocalyptic number.

It is an amenable number.

12792821761 is a deficient number, since it is larger than the sum of its proper divisors (56356271).

12792821761 is an equidigital number, since it uses as much as digits as its factorization.

12792821761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56356270.

The product of its digits is 169344, while the sum is 46.

The spelling of 12792821761 in words is "twelve billion, seven hundred ninety-two million, eight hundred twenty-one thousand, seven hundred sixty-one".