561553461 has 12 divisors (see below), whose sum is σ = 927008992. Its totient is φ = 320887656.

The previous prime is 561553453. The next prime is 561553483. The reversal of 561553461 is 164355165.

561553461 is a `hidden beast` number, since 5 + 61 + 5 + 534 + 61 = 666.

It is not a de Polignac number, because 561553461 - 2³ = 561553453 is a prime.

It is a super-2 number, since 2×561553461² = 630684579122157042, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561553961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4456711 + ... + 4456836.

Almost surely, 2^561553461 is an apocalyptic number.

It is an amenable number.

561553461 is a deficient number, since it is larger than the sum of its proper divisors (365455531).

561553461 is a wasteful number, since it uses less digits than its factorization.

561553461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8913560 (or 8913557 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 561553461 is about 23697.1192553019. The cubic root of 561553461 is about 825.0185296114.

The spelling of 561553461 in words is "five hundred sixty-one million, five hundred fifty-three thousand, four hundred sixty-one".