561357885888 has 84 divisors (see below), whose sum is σ = 1610806537080. Its totient is φ = 186912815616.

The previous prime is 561357885863. The next prime is 561357885899. The reversal of 561357885888 is 888588753165.

It is a happy number.

561357885888 is a `hidden beast` number, since 5 + 6 + 1 + 35 + 7 + 8 + 8 + 588 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14823 + ... + 1059686.

Almost surely, 2^561357885888 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 561357885888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (805403268540).

561357885888 is an abundant number, since it is smaller than the sum of its proper divisors (1049448651192).

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

561357885888 is a wasteful number, since it uses less digits than its factorization.

561357885888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075434 (or 1075421 counting only the distinct ones).

The product of its digits is 516096000, while the sum is 72.

The spelling of 561357885888 in words is "five hundred sixty-one billion, three hundred fifty-seven million, eight hundred eighty-five thousand, eight hundred eighty-eight".