561443144 has 16 divisors (see below), whose sum is σ = 1053216000. Its totient is φ = 280585552.

The previous prime is 561443107. The next prime is 561443167. The reversal of 561443144 is 441344165.

It is a self number, because there is not a number n which added to its sum of digits gives 561443144.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757 + ... + 33555.

It is an arithmetic number, because the mean of its divisors is an integer number (65826000).

Almost surely, 2^561443144 is an apocalyptic number.

It is an amenable number.

561443144 is a deficient number, since it is larger than the sum of its proper divisors (491772856).

561443144 is a wasteful number, since it uses less digits than its factorization.

561443144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34012 (or 34008 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 561443144 is about 23694.7914951789. The cubic root of 561443144 is about 824.9645011968.

The spelling of 561443144 in words is "five hundred sixty-one million, four hundred forty-three thousand, one hundred forty-four".