561364461 has 24 divisors (see below), whose sum is σ = 956593664. Its totient is φ = 310430880.

The previous prime is 561364457. The next prime is 561364477. The reversal of 561364461 is 164463165.

It is a happy number.

561364461 is a `hidden beast` number, since 5 + 6 + 1 + 3 + 644 + 6 + 1 = 666.

It is not a de Polignac number, because 561364461 - 2² = 561364457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561364421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141766 + ... + 145671.

Almost surely, 2^561364461 is an apocalyptic number.

It is an amenable number.

561364461 is a deficient number, since it is larger than the sum of its proper divisors (395229203).

561364461 is a wasteful number, since it uses less digits than its factorization.

561364461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287481 (or 287478 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 561364461 is about 23693.1310932093. The cubic root of 561364461 is about 824.9259613998.

The spelling of 561364461 in words is "five hundred sixty-one million, three hundred sixty-four thousand, four hundred sixty-one".