13518389865 has 16 divisors (see below), whose sum is σ = 21630873600. Its totient is φ = 7209324672.

The previous prime is 13518389803. The next prime is 13518389873. The reversal of 13518389865 is 56898381531.

It is a happy number.

It is not a de Polignac number, because 13518389865 - 2¹⁴ = 13518373481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386421 + ... + 419949.

It is an arithmetic number, because the mean of its divisors is an integer number (1351929600).

Almost surely, 2^13518389865 is an apocalyptic number.

13518389865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13518389865 is a deficient number, since it is larger than the sum of its proper divisors (8112483735).

13518389865 is a wasteful number, since it uses less digits than its factorization.

13518389865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60416.

The product of its digits is 6220800, while the sum is 57.

The spelling of 13518389865 in words is "thirteen billion, five hundred eighteen million, three hundred eighty-nine thousand, eight hundred sixty-five".