561166711602498 has 192 divisors, whose sum is σ = 1335925417881600. Its totient is φ = 176056258069440.

The previous prime is 561166711602481. The next prime is 561166711602547. The reversal of 561166711602498 is 894206117661165.

561166711602498 is a `hidden beast` number, since 5 + 6 + 1 + 1 + 6 + 6 + 7 + 11 + 602 + 4 + 9 + 8 = 666.

It is a super-2 number, since 2×561166711602498² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1010780848 + ... + 1011335876.

It is an arithmetic number, because the mean of its divisors is an integer number (6957944884800).

Almost surely, 2^{561166711602498} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561166711602498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667962708940800).

561166711602498 is an abundant number, since it is smaller than the sum of its proper divisors (774758706279102).

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

561166711602498 is a wasteful number, since it uses less digits than its factorization.

561166711602498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555779 (or 555767 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 561166711602498 in words is "five hundred sixty-one trillion, one hundred sixty-six billion, seven hundred eleven million, six hundred two thousand, four hundred ninety-eight".