485791561 has 2 divisors, whose sum is σ = 485791562. Its totient is φ = 485791560.

The previous prime is 485791549. The next prime is 485791571. The reversal of 485791561 is 165197584.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277422336 + 208369225 = 16656^2 + 14435^2 .

It is a cyclic number.

It is not a de Polignac number, because 485791561 - 2⁵ = 485791529 is a prime.

It is not a weakly prime, because it can be changed into another prime (485791531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242895780 + 242895781.

It is an arithmetic number, because the mean of its divisors is an integer number (242895781).

Almost surely, 2^485791561 is an apocalyptic number.

It is an amenable number.

485791561 is a deficient number, since it is larger than the sum of its proper divisors (1).

485791561 is an equidigital number, since it uses as much as digits as its factorization.

485791561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 46.

The square root of 485791561 is about 22040.6796855269. The cubic root of 485791561 is about 786.1100020426.

The spelling of 485791561 in words is "four hundred eighty-five million, seven hundred ninety-one thousand, five hundred sixty-one".