185080509917 has 2 divisors, whose sum is σ = 185080509918. Its totient is φ = 185080509916.

The previous prime is 185080509869. The next prime is 185080509931. The reversal of 185080509917 is 719905080581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146295540196 + 38784969721 = 382486^2 + 196939^2 .

It is a cyclic number.

It is not a de Polignac number, because 185080509917 - 2⁶ = 185080509853 is a prime.

It is a super-2 number, since 2×185080509917² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185080509517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92540254958 + 92540254959.

It is an arithmetic number, because the mean of its divisors is an integer number (92540254959).

Almost surely, 2^185080509917 is an apocalyptic number.

It is an amenable number.

185080509917 is a deficient number, since it is larger than the sum of its proper divisors (1).

185080509917 is an equidigital number, since it uses as much as digits as its factorization.

185080509917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 53.

The spelling of 185080509917 in words is "one hundred eighty-five billion, eighty million, five hundred nine thousand, nine hundred seventeen".