561116725 has 12 divisors (see below), whose sum is σ = 749307076. Its totient is φ = 414362880.

The previous prime is 561116719. The next prime is 561116741. The reversal of 561116725 is 527611165.

It can be written as a sum of positive squares in 6 ways, for example, as 194853681 + 366263044 = 13959^2 + 19138^2 .

It is not a de Polignac number, because 561116725 - 2¹¹ = 561114677 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 862932 + ... + 863581.

Almost surely, 2^561116725 is an apocalyptic number.

It is an amenable number.

561116725 is a deficient number, since it is larger than the sum of its proper divisors (188190351).

561116725 is a wasteful number, since it uses less digits than its factorization.

561116725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726536 (or 1726531 counting only the distinct ones).

The product of its digits is 12600, while the sum is 34.

The square root of 561116725 is about 23687.9025031766. The cubic root of 561116725 is about 824.8045940635.

The spelling of 561116725 in words is "five hundred sixty-one million, one hundred sixteen thousand, seven hundred twenty-five".