185195375993 has 2 divisors, whose sum is σ = 185195375994. Its totient is φ = 185195375992.

The previous prime is 185195375903. The next prime is 185195376001. The reversal of 185195375993 is 399573591581.

185195375993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143582639929 + 41612736064 = 378923^2 + 203992^2 .

It is a cyclic number.

It is not a de Polignac number, because 185195375993 - 2²² = 185191181689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (185195375903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92597687996 + 92597687997.

It is an arithmetic number, because the mean of its divisors is an integer number (92597687997).

Almost surely, 2^185195375993 is an apocalyptic number.

It is an amenable number.

185195375993 is a deficient number, since it is larger than the sum of its proper divisors (1).

185195375993 is an equidigital number, since it uses as much as digits as its factorization.

185195375993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45927000, while the sum is 65.

The spelling of 185195375993 in words is "one hundred eighty-five billion, one hundred ninety-five million, three hundred seventy-five thousand, nine hundred ninety-three".