2115115651161 has 48 divisors (see below), whose sum is σ = 3128409423360. Its totient is φ = 1376436597120.

The previous prime is 2115115651063. The next prime is 2115115651177. The reversal of 2115115651161 is 1611565115112.

2115115651161 is a `hidden beast` number, since 2 + 1 + 15 + 11 + 565 + 11 + 61 = 666.

It is not a de Polignac number, because 2115115651161 - 2¹⁵ = 2115115618393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2115115651261) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 268445820 + ... + 268453698.

It is an arithmetic number, because the mean of its divisors is an integer number (65175196320).

Almost surely, 2^{2115115651161} is an apocalyptic number.

It is an amenable number.

2115115651161 is a deficient number, since it is larger than the sum of its proper divisors (1013293772199).

2115115651161 is a wasteful number, since it uses less digits than its factorization.

2115115651161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9526 (or 9523 counting only the distinct ones).

The product of its digits is 9000, while the sum is 36.

The spelling of 2115115651161 in words is "two trillion, one hundred fifteen billion, one hundred fifteen million, six hundred fifty-one thousand, one hundred sixty-one".