13099565864 has 32 divisors (see below), whose sum is σ = 30622363200. Its totient is φ = 5103726720.

The previous prime is 13099565863. The next prime is 13099565873. The reversal of 13099565864 is 46856599031.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (13099565863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10632149 + ... + 10633380.

It is an arithmetic number, because the mean of its divisors is an integer number (956948850).

Almost surely, 2^13099565864 is an apocalyptic number.

13099565864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13099565864 is an abundant number, since it is smaller than the sum of its proper divisors (17522797336).

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

13099565864 is a wasteful number, since it uses less digits than its factorization.

13099565864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21265553 (or 21265549 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 13099565864 in words is "thirteen billion, ninety-nine million, five hundred sixty-five thousand, eight hundred sixty-four".