13640124564 has 36 divisors (see below), whose sum is σ = 37613677920. Its totient is φ = 4133370960.

The previous prime is 13640124541. The next prime is 13640124569. The reversal of 13640124564 is 46542104631.

13640124564 is a `hidden beast` number, since 1 + 3 + 6 + 401 + 245 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640124569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17221984 + ... + 17222775.

Almost surely, 2^13640124564 is an apocalyptic number.

It is an amenable number.

13640124564 is an abundant number, since it is smaller than the sum of its proper divisors (23973553356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13640124564 is a wasteful number, since it uses less digits than its factorization.

13640124564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34444780 (or 34444775 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 13640124564 in words is "thirteen billion, six hundred forty million, one hundred twenty-four thousand, five hundred sixty-four".