8285620561 has 2 divisors, whose sum is σ = 8285620562. Its totient is φ = 8285620560.

The previous prime is 8285620489. The next prime is 8285620571. The reversal of 8285620561 is 1650265828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4247780625 + 4037839936 = 65175^2 + 63544^2 .

It is a cyclic number.

It is not a de Polignac number, because 8285620561 - 2¹³ = 8285612369 is a prime.

It is not a weakly prime, because it can be changed into another prime (8285620571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4142810280 + 4142810281.

It is an arithmetic number, because the mean of its divisors is an integer number (4142810281).

Almost surely, 2^8285620561 is an apocalyptic number.

It is an amenable number.

8285620561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8285620561 is an equidigital number, since it uses as much as digits as its factorization.

8285620561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 8285620561 is about 91025.3841573877. The cubic root of 8285620561 is about 2023.5239407248.

The spelling of 8285620561 in words is "eight billion, two hundred eighty-five million, six hundred twenty thousand, five hundred sixty-one".