15724296681 has 4 divisors (see below), whose sum is σ = 20965728912. Its totient is φ = 10482864452.

The previous prime is 15724296649. The next prime is 15724296719. The reversal of 15724296681 is 18669242751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15724296681 - 2⁵ = 15724296649 is a prime.

It is a super-2 number, since 2×15724296681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15724296281) 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, 2620716111 + ... + 2620716116.

It is an arithmetic number, because the mean of its divisors is an integer number (5241432228).

Almost surely, 2^15724296681 is an apocalyptic number.

It is an amenable number.

15724296681 is a deficient number, since it is larger than the sum of its proper divisors (5241432231).

15724296681 is an equidigital number, since it uses as much as digits as its factorization.

15724296681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241432230.

The product of its digits is 1451520, while the sum is 51.

The spelling of 15724296681 in words is "fifteen billion, seven hundred twenty-four million, two hundred ninety-six thousand, six hundred eighty-one".