13261621363 has 16 divisors (see below), whose sum is σ = 13917731040. Its totient is φ = 12622611456.

The previous prime is 13261621343. The next prime is 13261621397. The reversal of 13261621363 is 36312616231.

It is a cyclic number.

It is not a de Polignac number, because 13261621363 - 2³³ = 4671686771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13261621343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670723 + ... + 690211.

It is an arithmetic number, because the mean of its divisors is an integer number (869858190).

Almost surely, 2^13261621363 is an apocalyptic number.

13261621363 is a deficient number, since it is larger than the sum of its proper divisors (656109677).

13261621363 is a wasteful number, since it uses less digits than its factorization.

13261621363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19926.

The product of its digits is 23328, while the sum is 34.

The spelling of 13261621363 in words is "thirteen billion, two hundred sixty-one million, six hundred twenty-one thousand, three hundred sixty-three".