13644665113 has 2 divisors, whose sum is σ = 13644665114. Its totient is φ = 13644665112.

The previous prime is 13644665101. The next prime is 13644665141. The reversal of 13644665113 is 31156644631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13198103689 + 446561424 = 114883^2 + 21132^2 .

It is a cyclic number.

It is not a de Polignac number, because 13644665113 - 2³³ = 5054730521 is a prime.

It is not a weakly prime, because it can be changed into another prime (13645665113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6822332556 + 6822332557.

It is an arithmetic number, because the mean of its divisors is an integer number (6822332557).

Almost surely, 2^13644665113 is an apocalyptic number.

It is an amenable number.

13644665113 is a deficient number, since it is larger than the sum of its proper divisors (1).

13644665113 is an equidigital number, since it uses as much as digits as its factorization.

13644665113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The spelling of 13644665113 in words is "thirteen billion, six hundred forty-four million, six hundred sixty-five thousand, one hundred thirteen".