561166722228 has 24 divisors (see below), whose sum is σ = 1496444592832. Its totient is φ = 160333349184.

The previous prime is 561166722223. The next prime is 561166722251. The reversal of 561166722228 is 822227661165.

It is a super-2 number, since 2×561166722228² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561166722223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3340278025 + ... + 3340278192.

Almost surely, 2^561166722228 is an apocalyptic number.

It is an amenable number.

561166722228 is an abundant number, since it is smaller than the sum of its proper divisors (935277870604).

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

561166722228 is a wasteful number, since it uses less digits than its factorization.

561166722228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680556231 (or 6680556229 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The spelling of 561166722228 in words is "five hundred sixty-one billion, one hundred sixty-six million, seven hundred twenty-two thousand, two hundred twenty-eight".