13264625621 has 6 divisors (see below), whose sum is σ = 14363470530. Its totient is φ = 12244269648.

The previous prime is 13264625609. The next prime is 13264625639. The reversal of 13264625621 is 12652646231.

It can be written as a sum of positive squares in 3 ways, for example, as 365344996 + 12899280625 = 19114^2 + 113575^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13264625621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13264625641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39244286 + ... + 39244623.

It is an arithmetic number, because the mean of its divisors is an integer number (2393911755).

Almost surely, 2^13264625621 is an apocalyptic number.

It is an amenable number.

13264625621 is a deficient number, since it is larger than the sum of its proper divisors (1098844909).

13264625621 is an equidigital number, since it uses as much as digits as its factorization.

13264625621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78488935 (or 78488922 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The spelling of 13264625621 in words is "thirteen billion, two hundred sixty-four million, six hundred twenty-five thousand, six hundred twenty-one".