561015666017 has 8 divisors (see below), whose sum is σ = 591091223424. Its totient is φ = 531413739648.

The previous prime is 561015665989. The next prime is 561015666031. The reversal of 561015666017 is 710666510165.

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

It is a cyclic number.

It is not a de Polignac number, because 561015666017 - 2²⁰ = 561014617441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561015666097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118405328 + ... + 118410065.

It is an arithmetic number, because the mean of its divisors is an integer number (73886402928).

Almost surely, 2^561015666017 is an apocalyptic number.

It is an amenable number.

561015666017 is a deficient number, since it is larger than the sum of its proper divisors (30075557407).

561015666017 is a wasteful number, since it uses less digits than its factorization.

561015666017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236815519.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 561015666017 in words is "five hundred sixty-one billion, fifteen million, six hundred sixty-six thousand, seventeen".