15611601504 has 48 divisors (see below), whose sum is σ = 41007133440. Its totient is φ = 5200479360.

The previous prime is 15611601497. The next prime is 15611601553. The reversal of 15611601504 is 40510611651.

It is a tau number, because it is divible by the number of its divisors (48).

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, 97509 + ... + 201819.

It is an arithmetic number, because the mean of its divisors is an integer number (854315280).

Almost surely, 2^15611601504 is an apocalyptic number.

It is an amenable number.

15611601504 is an abundant number, since it is smaller than the sum of its proper divisors (25395531936).

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

15611601504 is a wasteful number, since it uses less digits than its factorization.

15611601504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105883 (or 105875 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The spelling of 15611601504 in words is "fifteen billion, six hundred eleven million, six hundred one thousand, five hundred four".