561204045 has 40 divisors (see below), whose sum is σ = 1058972640. Its totient is φ = 283551840.

The previous prime is 561204043. The next prime is 561204089. The reversal of 561204045 is 540402165.

561204045 is a `hidden beast` number, since 5 + 612 + 0 + 4 + 0 + 45 = 666.

561204045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561204045 - 2¹ = 561204043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561204041) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 28771 + ... + 44160.

It is an arithmetic number, because the mean of its divisors is an integer number (26474316).

Almost surely, 2^561204045 is an apocalyptic number.

It is an amenable number.

561204045 is a deficient number, since it is larger than the sum of its proper divisors (497768595).

561204045 is a wasteful number, since it uses less digits than its factorization.

561204045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72967 (or 72958 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 561204045 is about 23689.7455663838. The cubic root of 561204045 is about 824.8473767254.

The spelling of 561204045 in words is "five hundred sixty-one million, two hundred four thousand, forty-five".