561624505 has 24 divisors (see below), whose sum is σ = 743222088. Its totient is φ = 405006336.

The previous prime is 561624491. The next prime is 561624523. The reversal of 561624505 is 505426165.

It can be written as a sum of positive squares in 4 ways, for example, as 91948921 + 469675584 = 9589^2 + 21672^2 .

It is not a de Polignac number, because 561624505 - 2⁵ = 561624473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117849 + ... + 122521.

It is an arithmetic number, because the mean of its divisors is an integer number (30967587).

Almost surely, 2^561624505 is an apocalyptic number.

It is an amenable number.

561624505 is a deficient number, since it is larger than the sum of its proper divisors (181597583).

561624505 is a wasteful number, since it uses less digits than its factorization.

561624505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4777 (or 4734 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 561624505 is about 23698.6182086636. The cubic root of 561624505 is about 825.0533200922.

The spelling of 561624505 in words is "five hundred sixty-one million, six hundred twenty-four thousand, five hundred five".