561787825 has 6 divisors (see below), whose sum is σ = 696616934. Its totient is φ = 449430240.

The previous prime is 561787823. The next prime is 561787841. The reversal of 561787825 is 528787165.

561787825 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 3 ways, for example, as 6290064 + 555497761 = 2508^2 + 23569^2 .

It is not a de Polignac number, because 561787825 - 2¹ = 561787823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561787823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11235732 + ... + 11235781.

Almost surely, 2^561787825 is an apocalyptic number.

It is an amenable number.

561787825 is a deficient number, since it is larger than the sum of its proper divisors (134829109).

561787825 is a wasteful number, since it uses less digits than its factorization.

561787825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22471523 (or 22471518 counting only the distinct ones).

The product of its digits is 940800, while the sum is 49.

The square root of 561787825 is about 23702.0637287136. The cubic root of 561787825 is about 825.1332873109.

The spelling of 561787825 in words is "five hundred sixty-one million, seven hundred eighty-seven thousand, eight hundred twenty-five".