115561660016 has 20 divisors (see below), whose sum is σ = 244255327224. Its totient is φ = 52528027200.

The previous prime is 115561660001. The next prime is 115561660021. The reversal of 115561660016 is 610066165511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328299995 + ... + 328300346.

Almost surely, 2^115561660016 is an apocalyptic number.

115561660016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

115561660016 is an abundant number, since it is smaller than the sum of its proper divisors (128693667208).

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

115561660016 is a wasteful number, since it uses less digits than its factorization.

115561660016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656600360 (or 656600354 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

It can be divided in two parts, 115561 and 660016, that added together give a palindrome (775577).

The spelling of 115561660016 in words is "one hundred fifteen billion, five hundred sixty-one million, six hundred sixty thousand, sixteen".