13368624640 has 80 divisors (see below), whose sum is σ = 36632467872. Its totient is φ = 4583522304.

The previous prime is 13368624631. The next prime is 13368624671. The reversal of 13368624640 is 4642686331.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355089 + ... + 390928.

Almost surely, 2^13368624640 is an apocalyptic number.

13368624640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13368624640 is an abundant number, since it is smaller than the sum of its proper divisors (23263843232).

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

13368624640 is an frugal number, since it uses more digits than its factorization.

13368624640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746047 (or 746031 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 13368624640 in words is "thirteen billion, three hundred sixty-eight million, six hundred twenty-four thousand, six hundred forty".