4308785561 has 2 divisors, whose sum is σ = 4308785562. Its totient is φ = 4308785560.

The previous prime is 4308785513. The next prime is 4308785563. The reversal of 4308785561 is 1655878034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4115992336 + 192793225 = 64156^2 + 13885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4308785561 is a prime.

Together with 4308785563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4308785563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2154392780 + 2154392781.

It is an arithmetic number, because the mean of its divisors is an integer number (2154392781).

Almost surely, 2^4308785561 is an apocalyptic number.

It is an amenable number.

4308785561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4308785561 is an equidigital number, since it uses as much as digits as its factorization.

4308785561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 47.

The square root of 4308785561 is about 65641.3403351882. The cubic root of 4308785561 is about 1627.2400584059.

The spelling of 4308785561 in words is "four billion, three hundred eight million, seven hundred eighty-five thousand, five hundred sixty-one".