13568390840 has 16 divisors (see below), whose sum is σ = 30528879480. Its totient is φ = 5427356320.

The previous prime is 13568390833. The next prime is 13568390867. The reversal of 13568390840 is 4809386531.

It is a congruent number.

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, 169604846 + ... + 169604925.

Almost surely, 2^13568390840 is an apocalyptic number.

13568390840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13568390840 is an abundant number, since it is smaller than the sum of its proper divisors (16960488640).

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

13568390840 is a wasteful number, since it uses less digits than its factorization.

13568390840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339209782 (or 339209778 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 13568390840 in words is "thirteen billion, five hundred sixty-eight million, three hundred ninety thousand, eight hundred forty".