561858950017 has 4 divisors (see below), whose sum is σ = 561871031296. Its totient is φ = 561846868740.

The previous prime is 561858949957. The next prime is 561858950021. The reversal of 561858950017 is 710059858165.

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 561858950017 - 2³⁵ = 527499211649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561858950017.

It is not an unprimeable number, because it can be changed into a prime (561858950027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5970609 + ... + 6063982.

It is an arithmetic number, because the mean of its divisors is an integer number (140467757824).

Almost surely, 2^561858950017 is an apocalyptic number.

It is an amenable number.

561858950017 is a deficient number, since it is larger than the sum of its proper divisors (12081279).

561858950017 is a wasteful number, since it uses less digits than its factorization.

561858950017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12081278.

The product of its (nonzero) digits is 3024000, while the sum is 55.

The spelling of 561858950017 in words is "five hundred sixty-one billion, eight hundred fifty-eight million, nine hundred fifty thousand, seventeen".