15115115116665 has 40 divisors (see below), whose sum is σ = 27099731522688. Its totient is φ = 8060059418400.

The previous prime is 15115115116579. The next prime is 15115115116741. The reversal of 15115115116665 is 56661151151151.

It is not a de Polignac number, because 15115115116665 - 2¹³ = 15115115108473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 15115115116665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 640561 + ... + 5535390.

Almost surely, 2^{15115115116665} is an apocalyptic number.

15115115116665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15115115116665 is a deficient number, since it is larger than the sum of its proper divisors (11984616406023).

15115115116665 is an equidigital number, since it uses as much as digits as its factorization.

15115115116665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182011 (or 6182002 counting only the distinct ones).

The product of its digits is 135000, while the sum is 45.

The spelling of 15115115116665 in words is "fifteen trillion, one hundred fifteen billion, one hundred fifteen million, one hundred sixteen thousand, six hundred sixty-five".