561504345 has 32 divisors (see below), whose sum is σ = 909971712. Its totient is φ = 295636992.

The previous prime is 561504337. The next prime is 561504353. The reversal of 561504345 is 543405165.

561504345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (561504337) and next prime (561504353).

It is not a de Polignac number, because 561504345 - 2³ = 561504337 is a prime.

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, 570724 + ... + 571706.

It is an arithmetic number, because the mean of its divisors is an integer number (28436616).

Almost surely, 2^561504345 is an apocalyptic number.

It is an amenable number.

561504345 is a deficient number, since it is larger than the sum of its proper divisors (348467367).

561504345 is a wasteful number, since it uses less digits than its factorization.

561504345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 561504345 is about 23696.0829041426. The cubic root of 561504345 is about 824.9944756288.

The spelling of 561504345 in words is "five hundred sixty-one million, five hundred four thousand, three hundred forty-five".