561626461 has 12 divisors (see below), whose sum is σ = 617955772. Its totient is φ = 510048000.

The previous prime is 561626437. The next prime is 561626477. The reversal of 561626461 is 164626165.

It can be written as a sum of positive squares in 2 ways, for example, as 341103961 + 220522500 = 18469^2 + 14850^2 .

It is not a de Polignac number, because 561626461 - 2⁹ = 561625949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561626461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561626561) 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, 165421 + ... + 168781.

Almost surely, 2^561626461 is an apocalyptic number.

It is an amenable number.

561626461 is a deficient number, since it is larger than the sum of its proper divisors (56329311).

561626461 is a wasteful number, since it uses less digits than its factorization.

561626461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764 (or 4753 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 561626461 is about 23698.6594768565. The cubic root of 561626461 is about 825.0542779104.

The spelling of 561626461 in words is "five hundred sixty-one million, six hundred twenty-six thousand, four hundred sixty-one".