561719760 has 160 divisors (see below), whose sum is σ = 1999372032. Its totient is φ = 127795200.

The previous prime is 561719749. The next prime is 561719771. The reversal of 561719760 is 67917165.

It is an interprime number because it is at equal distance from previous prime (561719749) and next prime (561719771).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 431110 + ... + 432410.

Almost surely, 2^561719760 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 561719760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999686016).

561719760 is an abundant number, since it is smaller than the sum of its proper divisors (1437652272).

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

561719760 is a wasteful number, since it uses less digits than its factorization.

561719760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1575 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 561719760 is about 23700.6278397852. The cubic root of 561719760 is about 825.0999621758.

The spelling of 561719760 in words is "five hundred sixty-one million, seven hundred nineteen thousand, seven hundred sixty".