561654200640 has 448 divisors, whose sum is σ = 2006373261312. Its totient is φ = 132174028800.

The previous prime is 561654200633. The next prime is 561654200677. The reversal of 561654200640 is 46002456165.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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, 32102295 + ... + 32119785.

It is an arithmetic number, because the mean of its divisors is an integer number (4478511744).

Almost surely, 2^561654200640 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 561654200640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003186630656).

561654200640 is an abundant number, since it is smaller than the sum of its proper divisors (1444719060672).

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

561654200640 is a wasteful number, since it uses less digits than its factorization.

561654200640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17638 (or 17628 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 561654200640 in words is "five hundred sixty-one billion, six hundred fifty-four million, two hundred thousand, six hundred forty".