15597347520 has 112 divisors (see below), whose sum is σ = 49911902208. Its totient is φ = 4126510080.

The previous prime is 15597347461. The next prime is 15597347531. The reversal of 15597347520 is 2574379551.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 15597347520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57955 + ... + 185885.

It is an arithmetic number, because the mean of its divisors is an integer number (445641984).

Almost surely, 2^15597347520 is an apocalyptic number.

15597347520 is a gapful number since it is divisible by the number (10) 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 15597347520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24955951104).

15597347520 is an abundant number, since it is smaller than the sum of its proper divisors (34314554688).

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

15597347520 is a wasteful number, since it uses less digits than its factorization.

15597347520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128078 (or 128068 counting only the distinct ones).

The product of its (nonzero) digits is 1323000, while the sum is 48.

The spelling of 15597347520 in words is "fifteen billion, five hundred ninety-seven million, three hundred forty-seven thousand, five hundred twenty".