18085008761 has 2 divisors, whose sum is σ = 18085008762. Its totient is φ = 18085008760.

The previous prime is 18085008737. The next prime is 18085008769. The reversal of 18085008761 is 16780058081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12665251600 + 5419757161 = 112540^2 + 73619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18085008761 is a prime.

It is not a weakly prime, because it can be changed into another prime (18085008769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9042504380 + 9042504381.

It is an arithmetic number, because the mean of its divisors is an integer number (9042504381).

Almost surely, 2^18085008761 is an apocalyptic number.

It is an amenable number.

18085008761 is a deficient number, since it is larger than the sum of its proper divisors (1).

18085008761 is an equidigital number, since it uses as much as digits as its factorization.

18085008761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 44.

The spelling of 18085008761 in words is "eighteen billion, eighty-five million, eight thousand, seven hundred sixty-one".