561888855304231 has 16 divisors (see below), whose sum is σ = 695798186105344. Its totient is φ = 441843970073184.

The previous prime is 561888855304201. The next prime is 561888855304247. The reversal of 561888855304231 is 132403558888165.

It is not a de Polignac number, because 561888855304231 - 2¹⁵ = 561888855271463 is a prime.

It is a super-2 number, since 2×561888855304231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561888855304201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18940484571 + ... + 18940514236.

It is an arithmetic number, because the mean of its divisors is an integer number (43487386631584).

Almost surely, 2^{561888855304231} is an apocalyptic number.

561888855304231 is a deficient number, since it is larger than the sum of its proper divisors (133909330801113).

561888855304231 is a wasteful number, since it uses less digits than its factorization.

561888855304231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37880998990.

The product of its (nonzero) digits is 221184000, while the sum is 67.

The spelling of 561888855304231 in words is "five hundred sixty-one trillion, eight hundred eighty-eight billion, eight hundred fifty-five million, three hundred four thousand, two hundred thirty-one".