561616731807222 has 256 divisors, whose sum is σ = 1395573694341120. Its totient is φ = 146716837926912.

The previous prime is 561616731807107. The next prime is 561616731807227. The reversal of 561616731807222 is 222708137616165.

It is a happy number.

It is a super-4 number, since 4×561616731807222⁴ (a number of 60 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561616731807227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 120596246718 + ... + 120596251374.

It is an arithmetic number, because the mean of its divisors is an integer number (5451459743520).

Almost surely, 2^{561616731807222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561616731807222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (697786847170560).

561616731807222 is an abundant number, since it is smaller than the sum of its proper divisors (833956962533898).

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

561616731807222 is a wasteful number, since it uses less digits than its factorization.

561616731807222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8115.

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 561616731807222 in words is "five hundred sixty-one trillion, six hundred sixteen billion, seven hundred thirty-one million, eight hundred seven thousand, two hundred twenty-two".