850166405161 has 2 divisors, whose sum is σ = 850166405162. Its totient is φ = 850166405160.

The previous prime is 850166405087. The next prime is 850166405167. The reversal of 850166405161 is 161504661058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 743535421225 + 106630983936 = 862285^2 + 326544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-850166405161 is a prime.

It is not a weakly prime, because it can be changed into another prime (850166405167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425083202580 + 425083202581.

It is an arithmetic number, because the mean of its divisors is an integer number (425083202581).

Almost surely, 2^850166405161 is an apocalyptic number.

It is an amenable number.

850166405161 is a deficient number, since it is larger than the sum of its proper divisors (1).

850166405161 is an equidigital number, since it uses as much as digits as its factorization.

850166405161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 850166405161 in words is "eight hundred fifty billion, one hundred sixty-six million, four hundred five thousand, one hundred sixty-one".