561738725 has 6 divisors (see below), whose sum is σ = 696556050. Its totient is φ = 449390960.

The previous prime is 561738703. The next prime is 561738731. The reversal of 561738725 is 527837165.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3976036 + 557762689 = 1994^2 + 23617^2 .

It is a de Polignac number, because none of the positive numbers 2^k-561738725 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11234750 + ... + 11234799.

It is an arithmetic number, because the mean of its divisors is an integer number (116092675).

Almost surely, 2^561738725 is an apocalyptic number.

It is an amenable number.

561738725 is a deficient number, since it is larger than the sum of its proper divisors (134817325).

561738725 is a wasteful number, since it uses less digits than its factorization.

561738725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22469559 (or 22469554 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The square root of 561738725 is about 23701.0279312945. The cubic root of 561738725 is about 825.1092478528.

The spelling of 561738725 in words is "five hundred sixty-one million, seven hundred thirty-eight thousand, seven hundred twenty-five".