15616015010661 has 16 divisors (see below), whose sum is σ = 22447132666560. Its totient is φ = 9599511068160.

The previous prime is 15616015010653. The next prime is 15616015010677. The reversal of 15616015010661 is 16601051061651.

15616015010661 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 15616015010661 - 2³ = 15616015010653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15616015010161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215470035 + ... + 215542496.

It is an arithmetic number, because the mean of its divisors is an integer number (1402945791660).

Almost surely, 2^{15616015010661} is an apocalyptic number.

It is an amenable number.

15616015010661 is a deficient number, since it is larger than the sum of its proper divisors (6831117655899).

15616015010661 is a wasteful number, since it uses less digits than its factorization.

15616015010661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431013476.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 15616015010661 in words is "fifteen trillion, six hundred sixteen billion, fifteen million, ten thousand, six hundred sixty-one".