115011515661 has 24 divisors (see below), whose sum is σ = 179185192704. Its totient is φ = 65426135040.

The previous prime is 115011515659. The next prime is 115011515687. The reversal of 115011515661 is 166515110511.

It is not a de Polignac number, because 115011515661 - 2¹ = 115011515659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115011515611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1721460 + ... + 1787021.

It is an arithmetic number, because the mean of its divisors is an integer number (7466049696).

Almost surely, 2^115011515661 is an apocalyptic number.

It is an amenable number.

115011515661 is a deficient number, since it is larger than the sum of its proper divisors (64173677043).

115011515661 is a wasteful number, since it uses less digits than its factorization.

115011515661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3508721 (or 3508714 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 33.

The spelling of 115011515661 in words is "one hundred fifteen billion, eleven million, five hundred fifteen thousand, six hundred sixty-one".