561345527840 has 96 divisors (see below), whose sum is σ = 1345330425600. Its totient is φ = 221297843200.

The previous prime is 561345527819. The next prime is 561345527851. The reversal of 561345527840 is 48725543165.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40673261 + ... + 40687059.

It is an arithmetic number, because the mean of its divisors is an integer number (14013858600).

Almost surely, 2^561345527840 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 561345527840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672665212800).

561345527840 is an abundant number, since it is smaller than the sum of its proper divisors (783984897760).

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

561345527840 is a wasteful number, since it uses less digits than its factorization.

561345527840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17466 (or 17458 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 50.

The spelling of 561345527840 in words is "five hundred sixty-one billion, three hundred forty-five million, five hundred twenty-seven thousand, eight hundred forty".