561887870976 has 320 divisors, whose sum is σ = 1691888259600. Its totient is φ = 185826410496.

The previous prime is 561887870909. The next prime is 561887870981. The reversal of 561887870976 is 679078788165.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 368934151 + ... + 368935673.

Almost surely, 2^561887870976 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 561887870976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845944129800).

561887870976 is an abundant number, since it is smaller than the sum of its proper divisors (1130000388624).

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

561887870976 is an equidigital number, since it uses as much as digits as its factorization.

561887870976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704 (or 1667 counting only the distinct ones).

The product of its (nonzero) digits is 284497920, while the sum is 72.

The spelling of 561887870976 in words is "five hundred sixty-one billion, eight hundred eighty-seven million, eight hundred seventy thousand, nine hundred seventy-six".