15535565604 has 72 divisors (see below), whose sum is σ = 42409523520. Its totient is φ = 4766807232.

The previous prime is 15535565597. The next prime is 15535565623. The reversal of 15535565604 is 40656553551.

15535565604 is a `hidden beast` number, since 1 + 5 + 5 + 35 + 5 + 6 + 5 + 604 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 15535565604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121779 + ... + 214245.

It is an arithmetic number, because the mean of its divisors is an integer number (589021160).

Almost surely, 2^15535565604 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 15535565604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21204761760).

15535565604 is an abundant number, since it is smaller than the sum of its proper divisors (26873957916).

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

15535565604 is a wasteful number, since it uses less digits than its factorization.

15535565604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92849 (or 92844 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 45.

The spelling of 15535565604 in words is "fifteen billion, five hundred thirty-five million, five hundred sixty-five thousand, six hundred four".