15797639271 has 4 divisors (see below), whose sum is σ = 21063519032. Its totient is φ = 10531759512.

The previous prime is 15797639269. The next prime is 15797639293. The reversal of 15797639271 is 17293679751.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15797639271 - 2¹ = 15797639269 is a prime.

It is a super-2 number, since 2×15797639271² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15797649271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2632939876 + ... + 2632939881.

It is an arithmetic number, because the mean of its divisors is an integer number (5265879758).

Almost surely, 2^15797639271 is an apocalyptic number.

15797639271 is a deficient number, since it is larger than the sum of its proper divisors (5265879761).

15797639271 is an equidigital number, since it uses as much as digits as its factorization.

15797639271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5265879760.

The product of its digits is 5000940, while the sum is 57.

The spelling of 15797639271 in words is "fifteen billion, seven hundred ninety-seven million, six hundred thirty-nine thousand, two hundred seventy-one".