15115551165 has 48 divisors (see below), whose sum is σ = 30780771840. Its totient is φ = 6764999040.

The previous prime is 15115551109. The next prime is 15115551179. The reversal of 15115551165 is 56115551151.

15115551165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15115551165 - 2¹⁷ = 15115420093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1168045 + ... + 1180914.

It is an arithmetic number, because the mean of its divisors is an integer number (641266080).

Almost surely, 2^15115551165 is an apocalyptic number.

15115551165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15115551165 is an abundant number, since it is smaller than the sum of its proper divisors (15665220675).

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

15115551165 is a wasteful number, since it uses less digits than its factorization.

15115551165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348994 (or 2348991 counting only the distinct ones).

The product of its digits is 18750, while the sum is 36.

The spelling of 15115551165 in words is "fifteen billion, one hundred fifteen million, five hundred fifty-one thousand, one hundred sixty-five".