591566961 has 12 divisors (see below), whose sum is σ = 799730448. Its totient is φ = 388965024.

The previous prime is 591566947. The next prime is 591566971. The reversal of 591566961 is 169665195.

It is not a de Polignac number, because 591566961 - 2⁹ = 591566449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 591566961.

It is not an unprimeable number, because it can be changed into a prime (591566971) 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, 2515 + ... + 34488.

It is an arithmetic number, because the mean of its divisors is an integer number (66644204).

Almost surely, 2^591566961 is an apocalyptic number.

It is an amenable number.

591566961 is a deficient number, since it is larger than the sum of its proper divisors (208163487).

591566961 is an equidigital number, since it uses as much as digits as its factorization.

591566961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37152 (or 37079 counting only the distinct ones).

The product of its digits is 437400, while the sum is 48.

The square root of 591566961 is about 24322.1495966125. The cubic root of 591566961 is about 839.4625062020.

The spelling of 591566961 in words is "five hundred ninety-one million, five hundred sixty-six thousand, nine hundred sixty-one".