561656059 has 2 divisors, whose sum is σ = 561656060. Its totient is φ = 561656058.

The previous prime is 561656033. The next prime is 561656083. The reversal of 561656059 is 950656165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561656059 - 2⁷ = 561655931 is a prime.

It is a super-2 number, since 2×561656059² = 630915057222822962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (561656009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280828029 + 280828030.

It is an arithmetic number, because the mean of its divisors is an integer number (280828030).

Almost surely, 2^561656059 is an apocalyptic number.

561656059 is a deficient number, since it is larger than the sum of its proper divisors (1).

561656059 is an equidigital number, since it uses as much as digits as its factorization.

561656059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 43.

The square root of 561656059 is about 23699.2839343302. The cubic root of 561656059 is about 825.0687712491.

The spelling of 561656059 in words is "five hundred sixty-one million, six hundred fifty-six thousand, fifty-nine".