561191847815 has 16 divisors (see below), whose sum is σ = 689126030208. Its totient is φ = 438490653216.

The previous prime is 561191847803. The next prime is 561191847859. The reversal of 561191847815 is 518748191165.

It is a cyclic number.

It is not a de Polignac number, because 561191847815 - 2⁶ = 561191847751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5201852 + ... + 5308638.

It is an arithmetic number, because the mean of its divisors is an integer number (43070376888).

Almost surely, 2^561191847815 is an apocalyptic number.

561191847815 is a deficient number, since it is larger than the sum of its proper divisors (127934182393).

561191847815 is a wasteful number, since it uses less digits than its factorization.

561191847815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131278.

The product of its digits is 2419200, while the sum is 56.

The spelling of 561191847815 in words is "five hundred sixty-one billion, one hundred ninety-one million, eight hundred forty-seven thousand, eight hundred fifteen".