561122999917 has 2 divisors, whose sum is σ = 561122999918. Its totient is φ = 561122999916.

The previous prime is 561122999903. The next prime is 561122999963. The reversal of 561122999917 is 719999221165.

561122999917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 523045721961 + 38077277956 = 723219^2 + 195134^2 .

It is a cyclic number.

It is not a de Polignac number, because 561122999917 - 2¹⁵ = 561122967149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561122991917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280561499958 + 280561499959.

It is an arithmetic number, because the mean of its divisors is an integer number (280561499959).

Almost surely, 2^561122999917 is an apocalyptic number.

It is an amenable number.

561122999917 is a deficient number, since it is larger than the sum of its proper divisors (1).

561122999917 is an equidigital number, since it uses as much as digits as its factorization.

561122999917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 61.

The spelling of 561122999917 in words is "five hundred sixty-one billion, one hundred twenty-two million, nine hundred ninety-nine thousand, nine hundred seventeen".