13640566313 has 6 divisors (see below), whose sum is σ = 14993349882. Its totient is φ = 12400514720.

The previous prime is 13640566297. The next prime is 13640566321. The reversal of 13640566313 is 31366504631.

It can be written as a sum of positive squares in only one way, i.e., 12044404009 + 1596162304 = 109747^2 + 39952^2 .

It is not a de Polignac number, because 13640566313 - 2⁴ = 13640566297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13640566333) 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, 56365856 + ... + 56366097.

It is an arithmetic number, because the mean of its divisors is an integer number (2498891647).

Almost surely, 2^13640566313 is an apocalyptic number.

It is an amenable number.

13640566313 is a deficient number, since it is larger than the sum of its proper divisors (1352783569).

13640566313 is a wasteful number, since it uses less digits than its factorization.

13640566313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112731975 (or 112731964 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 13640566313 in words is "thirteen billion, six hundred forty million, five hundred sixty-six thousand, three hundred thirteen".