1850166685013 has 2 divisors, whose sum is σ = 1850166685014. Its totient is φ = 1850166685012.

The previous prime is 1850166684997. The next prime is 1850166685027. The reversal of 1850166685013 is 3105866610581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1769386813489 + 80779871524 = 1330183^2 + 284218^2 .

It is a cyclic number.

It is not a de Polignac number, because 1850166685013 - 2⁴ = 1850166684997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1850166685513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925083342506 + 925083342507.

It is an arithmetic number, because the mean of its divisors is an integer number (925083342507).

Almost surely, 2^{1850166685013} is an apocalyptic number.

It is an amenable number.

1850166685013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850166685013 is an equidigital number, since it uses as much as digits as its factorization.

1850166685013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 1850166685013 in words is "one trillion, eight hundred fifty billion, one hundred sixty-six million, six hundred eighty-five thousand, thirteen".