850905759181 has 2 divisors, whose sum is σ = 850905759182. Its totient is φ = 850905759180.

The previous prime is 850905759169. The next prime is 850905759233. The reversal of 850905759181 is 181957509058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 849409229956 + 1496529225 = 921634^2 + 38685^2 .

It is a cyclic number.

It is not a de Polignac number, because 850905759181 - 2¹⁷ = 850905628109 is a prime.

It is a super-2 number, since 2×850905759181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (850905759101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425452879590 + 425452879591.

It is an arithmetic number, because the mean of its divisors is an integer number (425452879591).

Almost surely, 2^850905759181 is an apocalyptic number.

It is an amenable number.

850905759181 is a deficient number, since it is larger than the sum of its proper divisors (1).

850905759181 is an equidigital number, since it uses as much as digits as its factorization.

850905759181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536000, while the sum is 58.

The spelling of 850905759181 in words is "eight hundred fifty billion, nine hundred five million, seven hundred fifty-nine thousand, one hundred eighty-one".