561616525 has 12 divisors (see below), whose sum is σ = 715227412. Its totient is φ = 437149440.

The previous prime is 561616513. The next prime is 561616541. The reversal of 561616525 is 525616165.

561616525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 15319396 + 546297129 = 3914^2 + 23373^2 .

It is not a de Polignac number, because 561616525 - 2⁵ = 561616493 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an alternating number because its digits alternate between odd and even.

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, 302652 + ... + 304501.

Almost surely, 2^561616525 is an apocalyptic number.

It is an amenable number.

561616525 is a deficient number, since it is larger than the sum of its proper divisors (153610887).

561616525 is a wasteful number, since it uses less digits than its factorization.

561616525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607200 (or 607195 counting only the distinct ones).

The product of its digits is 54000, while the sum is 37.

The square root of 561616525 is about 23698.4498438189. The cubic root of 561616525 is about 825.0494124062.

The spelling of 561616525 in words is "five hundred sixty-one million, six hundred sixteen thousand, five hundred twenty-five".