561888855304242 has 32 divisors (see below), whose sum is σ = 1149913773803520. Its totient is φ = 182940287431440.

The previous prime is 561888855304201. The next prime is 561888855304247. The reversal of 561888855304242 is 242403558888165.

It is a super-2 number, since 2×561888855304242² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561888855304247) 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, 249064567 + ... + 251310437.

It is an arithmetic number, because the mean of its divisors is an integer number (35934805431360).

Almost surely, 2^{561888855304242} is an apocalyptic number.

561888855304242 is an abundant number, since it is smaller than the sum of its proper divisors (588024918499278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561888855304242 is a wasteful number, since it uses less digits than its factorization.

561888855304242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215638.

The product of its (nonzero) digits is 589824000, while the sum is 69.

The spelling of 561888855304242 in words is "five hundred sixty-one trillion, eight hundred eighty-eight billion, eight hundred fifty-five million, three hundred four thousand, two hundred forty-two".