15427924561 has 4 divisors (see below), whose sum is σ = 17631913792. Its totient is φ = 13223935332.

The previous prime is 15427924537. The next prime is 15427924579. The reversal of 15427924561 is 16542972451.

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 15427924561 - 2⁵ = 15427924529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15427924531) 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, 1101994605 + ... + 1101994618.

It is an arithmetic number, because the mean of its divisors is an integer number (4407978448).

Almost surely, 2^15427924561 is an apocalyptic number.

It is an amenable number.

15427924561 is a deficient number, since it is larger than the sum of its proper divisors (2203989231).

15427924561 is an equidigital number, since it uses as much as digits as its factorization.

15427924561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203989230.

The product of its digits is 604800, while the sum is 46.

The spelling of 15427924561 in words is "fifteen billion, four hundred twenty-seven million, nine hundred twenty-four thousand, five hundred sixty-one".