15616611504 has 120 divisors (see below), whose sum is σ = 47279057280. Its totient is φ = 4783435776.

The previous prime is 15616611503. The next prime is 15616611581. The reversal of 15616611504 is 40511661651.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (15616611503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398752 + ... + 436160.

It is an arithmetic number, because the mean of its divisors is an integer number (393992144).

Almost surely, 2^15616611504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15616611504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23639528640).

15616611504 is an abundant number, since it is smaller than the sum of its proper divisors (31662445776).

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

15616611504 is a wasteful number, since it uses less digits than its factorization.

15616611504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37659 (or 37650 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 15616611504 in words is "fifteen billion, six hundred sixteen million, six hundred eleven thousand, five hundred four".