12769496721 has 48 divisors (see below), whose sum is σ = 19693497600. Its totient is φ = 8176199616.

The previous prime is 12769496639. The next prime is 12769496759.

12769496721 is a `hidden beast` number, since 1 + 27 + 69 + 496 + 72 + 1 = 666.

12769496721 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12769496721 - 2³³ = 4179562129 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12769496771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2917891 + ... + 2922263.

It is an arithmetic number, because the mean of its divisors is an integer number (410281200).

Almost surely, 2^12769496721 is an apocalyptic number.

It is an amenable number.

12769496721 is a deficient number, since it is larger than the sum of its proper divisors (6924000879).

12769496721 is an equidigital number, since it uses as much as digits as its factorization.

12769496721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4535 (or 4492 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 12769496721 in words is "twelve billion, seven hundred sixty-nine million, four hundred ninety-six thousand, seven hundred twenty-one".