185388118417 has 2 divisors, whose sum is σ = 185388118418. Its totient is φ = 185388118416.

The previous prime is 185388118387. The next prime is 185388118457. The reversal of 185388118417 is 714811883581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138837466881 + 46550651536 = 372609^2 + 215756^2 .

It is a cyclic number.

It is not a de Polignac number, because 185388118417 - 2³⁵ = 151028380049 is a prime.

It is a super-2 number, since 2×185388118417² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (185388118457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92694059208 + 92694059209.

It is an arithmetic number, because the mean of its divisors is an integer number (92694059209).

Almost surely, 2^185388118417 is an apocalyptic number.

It is an amenable number.

185388118417 is a deficient number, since it is larger than the sum of its proper divisors (1).

185388118417 is an equidigital number, since it uses as much as digits as its factorization.

185388118417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1720320, while the sum is 55.

The spelling of 185388118417 in words is "one hundred eighty-five billion, three hundred eighty-eight million, one hundred eighteen thousand, four hundred seventeen".