561489392430 has 288 divisors, whose sum is σ = 1594672567488. Its totient is φ = 136962662400.

The previous prime is 561489392383. The next prime is 561489392441. The reversal of 561489392430 is 34293984165.

561489392430 is a `hidden beast` number, since 561 + 4 + 8 + 9 + 39 + 2 + 43 + 0 = 666.

It is a super-2 number, since 2×561489392430² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 331652664 + ... + 331654356.

It is an arithmetic number, because the mean of its divisors is an integer number (5537057526).

Almost surely, 2^561489392430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561489392430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797336283744).

561489392430 is an abundant number, since it is smaller than the sum of its proper divisors (1033183175058).

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

561489392430 is a wasteful number, since it uses less digits than its factorization.

561489392430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092 (or 2072 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 561489392430 in words is "five hundred sixty-one billion, four hundred eighty-nine million, three hundred ninety-two thousand, four hundred thirty".