13640799820 has 12 divisors (see below), whose sum is σ = 28645679664. Its totient is φ = 5456319920.

The previous prime is 13640799787. The next prime is 13640799841. The reversal of 13640799820 is 2899704631.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341019976 + ... + 341020015.

It is an arithmetic number, because the mean of its divisors is an integer number (2387139972).

Almost surely, 2^13640799820 is an apocalyptic number.

13640799820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13640799820 is an abundant number, since it is smaller than the sum of its proper divisors (15004879844).

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

13640799820 is a wasteful number, since it uses less digits than its factorization.

13640799820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682040000 (or 682039998 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 13640799820 in words is "thirteen billion, six hundred forty million, seven hundred ninety-nine thousand, eight hundred twenty".