561551607 has 12 divisors (see below), whose sum is σ = 811546944. Its totient is φ = 374175360.

The previous prime is 561551603. The next prime is 561551611. The reversal of 561551607 is 706155165.

It is an interprime number because it is at equal distance from previous prime (561551603) and next prime (561551611).

It is not a de Polignac number, because 561551607 - 2² = 561551603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561551603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3738 + ... + 33720.

It is an arithmetic number, because the mean of its divisors is an integer number (67628912).

Almost surely, 2^561551607 is an apocalyptic number.

561551607 is a deficient number, since it is larger than the sum of its proper divisors (249995337).

561551607 is a wasteful number, since it uses less digits than its factorization.

561551607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32070 (or 32067 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 561551607 is about 23697.0801365907. The cubic root of 561551607 is about 825.0176216622.

The spelling of 561551607 in words is "five hundred sixty-one million, five hundred fifty-one thousand, six hundred seven".