15606111616 has 64 divisors (see below), whose sum is σ = 33132602880. Its totient is φ = 7304923648.

The previous prime is 15606111607. The next prime is 15606111691. The reversal of 15606111616 is 61611160651.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81975 + ... + 194761.

It is an arithmetic number, because the mean of its divisors is an integer number (517696920).

Almost surely, 2^15606111616 is an apocalyptic number.

15606111616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15606111616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16566301440).

15606111616 is an abundant number, since it is smaller than the sum of its proper divisors (17526491264).

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

15606111616 is a wasteful number, since it uses less digits than its factorization.

15606111616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112871 (or 112859 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 15606111616 in words is "fifteen billion, six hundred six million, one hundred eleven thousand, six hundred sixteen".