15495928561 has 4 divisors (see below), whose sum is σ = 15614218224. Its totient is φ = 15377638900.

The previous prime is 15495928549. The next prime is 15495928571. The reversal of 15495928561 is 16582959451.

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 15495928561 - 2⁷ = 15495928433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15495928501) 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, 59144635 + ... + 59144896.

It is an arithmetic number, because the mean of its divisors is an integer number (3903554556).

Almost surely, 2^15495928561 is an apocalyptic number.

It is an amenable number.

15495928561 is a deficient number, since it is larger than the sum of its proper divisors (118289663).

15495928561 is a wasteful number, since it uses less digits than its factorization.

15495928561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118289662.

The product of its digits is 3888000, while the sum is 55.

The spelling of 15495928561 in words is "fifteen billion, four hundred ninety-five million, nine hundred twenty-eight thousand, five hundred sixty-one".