13915455720 has 32 divisors (see below), whose sum is σ = 41746367520. Its totient is φ = 3710788160.

The previous prime is 13915455667. The next prime is 13915455731. The reversal of 13915455720 is 2755451931.

It is a happy 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, 57980946 + ... + 57981185.

It is an arithmetic number, because the mean of its divisors is an integer number (1304573985).

Almost surely, 2^13915455720 is an apocalyptic number.

13915455720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13915455720 is an abundant number, since it is smaller than the sum of its proper divisors (27830911800).

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

13915455720 is a wasteful number, since it uses less digits than its factorization.

13915455720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115962145 (or 115962141 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 42.

The spelling of 13915455720 in words is "thirteen billion, nine hundred fifteen million, four hundred fifty-five thousand, seven hundred twenty".