561158844840 has 512 divisors, whose sum is σ = 2072226240000. Its totient is φ = 133942026240.

The previous prime is 561158844803. The next prime is 561158844853. The reversal of 561158844840 is 48448851165.

561158844840 is a `hidden beast` number, since 5 + 6 + 1 + 158 + 8 + 4 + 484 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 284418094 + ... + 284420066.

It is an arithmetic number, because the mean of its divisors is an integer number (4047316875).

Almost surely, 2^561158844840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561158844840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1036113120000).

561158844840 is an abundant number, since it is smaller than the sum of its proper divisors (1511067395160).

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

561158844840 is a wasteful number, since it uses less digits than its factorization.

561158844840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362 (or 2352 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 54.

The spelling of 561158844840 in words is "five hundred sixty-one billion, one hundred fifty-eight million, eight hundred forty-four thousand, eight hundred forty".