15605520216 has 128 divisors (see below), whose sum is σ = 46139466240. Its totient is φ = 4336128000.

The previous prime is 15605520197. The next prime is 15605520247. The reversal of 15605520216 is 61202550651.

It is a super-2 number, since 2×15605520216² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 503176 + ... + 533288.

It is an arithmetic number, because the mean of its divisors is an integer number (360464580).

Almost surely, 2^15605520216 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 15605520216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23069733120).

15605520216 is an abundant number, since it is smaller than the sum of its proper divisors (30533946024).

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

15605520216 is a wasteful number, since it uses less digits than its factorization.

15605520216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30297 (or 30293 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 15605520216 in words is "fifteen billion, six hundred five million, five hundred twenty thousand, two hundred sixteen".