385920193181 has 2 divisors, whose sum is σ = 385920193182. Its totient is φ = 385920193180.

The previous prime is 385920193177. The next prime is 385920193189. The reversal of 385920193181 is 181391029583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267904584025 + 118015609156 = 517595^2 + 343534^2 .

It is a cyclic number.

It is not a de Polignac number, because 385920193181 - 2² = 385920193177 is a prime.

It is a super-2 number, since 2×385920193181² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385920193189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192960096590 + 192960096591.

It is an arithmetic number, because the mean of its divisors is an integer number (192960096591).

Almost surely, 2^385920193181 is an apocalyptic number.

It is an amenable number.

385920193181 is a deficient number, since it is larger than the sum of its proper divisors (1).

385920193181 is an equidigital number, since it uses as much as digits as its factorization.

385920193181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 385920193181 in words is "three hundred eighty-five billion, nine hundred twenty million, one hundred ninety-three thousand, one hundred eighty-one".