561943312 has 80 divisors (see below), whose sum is σ = 1278882432. Its totient is φ = 234224640.

The previous prime is 561943303. The next prime is 561943321. The reversal of 561943312 is 213349165.

It is an interprime number because it is at equal distance from previous prime (561943303) and next prime (561943321).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 812887 + ... + 813577.

Almost surely, 2^561943312 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 561943312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (639441216).

561943312 is an abundant number, since it is smaller than the sum of its proper divisors (716939120).

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

561943312 is a wasteful number, since it uses less digits than its factorization.

561943312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 890 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 561943312 is about 23705.3435326299. The cubic root of 561943312 is about 825.2094048172.

The spelling of 561943312 in words is "five hundred sixty-one million, nine hundred forty-three thousand, three hundred twelve".