15797470521 has 8 divisors (see below), whose sum is σ = 24072336064. Its totient is φ = 9027126000.

The previous prime is 15797470417. The next prime is 15797470553. The reversal of 15797470521 is 12507479751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15797470521 - 2¹⁵ = 15797437753 is a prime.

It is a super-2 number, since 2×15797470521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15797470021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376130230 + ... + 376130271.

It is an arithmetic number, because the mean of its divisors is an integer number (3009042008).

Almost surely, 2^15797470521 is an apocalyptic number.

It is an amenable number.

15797470521 is a deficient number, since it is larger than the sum of its proper divisors (8274865543).

15797470521 is an equidigital number, since it uses as much as digits as its factorization.

15797470521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752260511.

The product of its (nonzero) digits is 617400, while the sum is 48.

The spelling of 15797470521 in words is "fifteen billion, seven hundred ninety-seven million, four hundred seventy thousand, five hundred twenty-one".