561157015015 has 8 divisors (see below), whose sum is σ = 673412084928. Its totient is φ = 448909834080.

The previous prime is 561157014997. The next prime is 561157015021. The reversal of 561157015015 is 510510751165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561157015015 - 2²⁷ = 561022797287 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 7 ways as a sum of consecutive naturals, for example, 1814607 + ... + 2101216.

It is an arithmetic number, because the mean of its divisors is an integer number (84176510616).

Almost surely, 2^561157015015 is an apocalyptic number.

561157015015 is a deficient number, since it is larger than the sum of its proper divisors (112255069913).

561157015015 is a wasteful number, since it uses less digits than its factorization.

561157015015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944489.

The product of its (nonzero) digits is 26250, while the sum is 37.

The spelling of 561157015015 in words is "five hundred sixty-one billion, one hundred fifty-seven million, fifteen thousand, fifteen".