13640799839 has 4 divisors (see below), whose sum is σ = 13641039456. Its totient is φ = 13640560224.

The previous prime is 13640799787. The next prime is 13640799841. The reversal of 13640799839 is 93899704631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13640799839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640799869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19847 + ... + 166359.

It is an arithmetic number, because the mean of its divisors is an integer number (3410259864).

Almost surely, 2^13640799839 is an apocalyptic number.

13640799839 is a deficient number, since it is larger than the sum of its proper divisors (239617).

13640799839 is an equidigital number, since it uses as much as digits as its factorization.

13640799839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239616.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 13640799839 in words is "thirteen billion, six hundred forty million, seven hundred ninety-nine thousand, eight hundred thirty-nine".