561601507 has 2 divisors, whose sum is σ = 561601508. Its totient is φ = 561601506.

The previous prime is 561601499. The next prime is 561601517. The reversal of 561601507 is 705106165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561601507 - 2³ = 561601499 is a prime.

It is a super-3 number, since 3×561601507³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (561601517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280800753 + 280800754.

It is an arithmetic number, because the mean of its divisors is an integer number (280800754).

Almost surely, 2^561601507 is an apocalyptic number.

561601507 is a deficient number, since it is larger than the sum of its proper divisors (1).

561601507 is an equidigital number, since it uses as much as digits as its factorization.

561601507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 561601507 is about 23698.1329855328. The cubic root of 561601507 is about 825.0420582170.

The spelling of 561601507 in words is "five hundred sixty-one million, six hundred one thousand, five hundred seven".