13047956399 has 32 divisors (see below), whose sum is σ = 14698635840. Its totient is φ = 11521843200.

The previous prime is 13047956381. The next prime is 13047956401. The reversal of 13047956399 is 99365974031.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13047956399 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 (13047956899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5719139 + ... + 5721419.

It is an arithmetic number, because the mean of its divisors is an integer number (459332370).

Almost surely, 2^13047956399 is an apocalyptic number.

13047956399 is a deficient number, since it is larger than the sum of its proper divisors (1650679441).

13047956399 is a wasteful number, since it uses less digits than its factorization.

13047956399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651.

The product of its (nonzero) digits is 5511240, while the sum is 56.

The spelling of 13047956399 in words is "thirteen billion, forty-seven million, nine hundred fifty-six thousand, three hundred ninety-nine".