13865169520 has 40 divisors (see below), whose sum is σ = 32280996384. Its totient is φ = 5538415872.

The previous prime is 13865169491. The next prime is 13865169541. The reversal of 13865169520 is 2596156831.

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

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, 61039 + ... + 177358.

Almost surely, 2^13865169520 is an apocalyptic number.

13865169520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13865169520 is an abundant number, since it is smaller than the sum of its proper divisors (18415826864).

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

13865169520 is a wasteful number, since it uses less digits than its factorization.

13865169520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239137 (or 239131 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 13865169520 in words is "thirteen billion, eight hundred sixty-five million, one hundred sixty-nine thousand, five hundred twenty".