561547111560 has 256 divisors, whose sum is σ = 1741218716160. Its totient is φ = 144811130880.

The previous prime is 561547111549. The next prime is 561547111621. The reversal of 561547111560 is 65111745165.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 162248230 + ... + 162251690.

It is an arithmetic number, because the mean of its divisors is an integer number (6801635610).

Almost surely, 2^561547111560 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 561547111560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870609358080).

561547111560 is an abundant number, since it is smaller than the sum of its proper divisors (1179671604600).

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

561547111560 is a wasteful number, since it uses less digits than its factorization.

561547111560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888 (or 3884 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 42.

The spelling of 561547111560 in words is "five hundred sixty-one billion, five hundred forty-seven million, one hundred eleven thousand, five hundred sixty".