561995194320 has 360 divisors, whose sum is σ = 2242228345344. Its totient is φ = 125722566144.

The previous prime is 561995194309. The next prime is 561995194333. The reversal of 561995194320 is 23491599165.

561995194320 is a `hidden beast` number, since 5 + 6 + 1 + 99 + 519 + 4 + 32 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1488697 + ... + 1827623.

Almost surely, 2^561995194320 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 561995194320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121114172672).

561995194320 is an abundant number, since it is smaller than the sum of its proper divisors (1680233151024).

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

561995194320 is a wasteful number, since it uses less digits than its factorization.

561995194320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339007 (or 338991 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 561995194320 in words is "five hundred sixty-one billion, nine hundred ninety-five million, one hundred ninety-four thousand, three hundred twenty".