15561116505016 has 16 divisors (see below), whose sum is σ = 29197539924840. Its totient is φ = 7775105858400.

The previous prime is 15561116505013. The next prime is 15561116505023. The reversal of 15561116505016 is 61050561116551.

15561116505016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15561116505013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681537135 + ... + 681559966.

Almost surely, 2^{15561116505016} is an apocalyptic number.

It is an amenable number.

15561116505016 is a deficient number, since it is larger than the sum of its proper divisors (13636423419824).

15561116505016 is a wasteful number, since it uses less digits than its factorization.

15561116505016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363098534 (or 1363098530 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 43.

The spelling of 15561116505016 in words is "fifteen trillion, five hundred sixty-one billion, one hundred sixteen million, five hundred five thousand, sixteen".