13995385520 has 40 divisors (see below), whose sum is σ = 33231605184. Its totient is φ = 5479043072.

The previous prime is 13995385493. The next prime is 13995385559. The reversal of 13995385520 is 2558359931.

It is a tau number, because it is divible by the number of its divisors (40).

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, 1857329 + ... + 1864848.

Almost surely, 2^13995385520 is an apocalyptic number.

13995385520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13995385520 is an abundant number, since it is smaller than the sum of its proper divisors (19236219664).

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

13995385520 is a wasteful number, since it uses less digits than its factorization.

13995385520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722237 (or 3722231 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 50.

The spelling of 13995385520 in words is "thirteen billion, nine hundred ninety-five million, three hundred eighty-five thousand, five hundred twenty".