65561593 has 2 divisors, whose sum is σ = 65561594. Its totient is φ = 65561592.

The previous prime is 65561581. The next prime is 65561597. The reversal of 65561593 is 39516556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55398249 + 10163344 = 7443^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 65561593 - 2²⁵ = 32007161 is a prime.

It is not a weakly prime, because it can be changed into another prime (65561597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32780796 + 32780797.

It is an arithmetic number, because the mean of its divisors is an integer number (32780797).

Almost surely, 2^65561593 is an apocalyptic number.

It is an amenable number.

65561593 is a deficient number, since it is larger than the sum of its proper divisors (1).

65561593 is an equidigital number, since it uses as much as digits as its factorization.

65561593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121500, while the sum is 40.

The square root of 65561593 is about 8097.0113622250. The cubic root of 65561593 is about 403.2272114919.

The spelling of 65561593 in words is "sixty-five million, five hundred sixty-one thousand, five hundred ninety-three".