1853366861 has 2 divisors, whose sum is σ = 1853366862. Its totient is φ = 1853366860.

The previous prime is 1853366831. The next prime is 1853366873. The reversal of 1853366861 is 1686633581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1709822500 + 143544361 = 41350^2 + 11981^2 .

It is a cyclic number.

It is not a de Polignac number, because 1853366861 - 2¹⁰ = 1853365837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1853366821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 926683430 + 926683431.

It is an arithmetic number, because the mean of its divisors is an integer number (926683431).

Almost surely, 2^1853366861 is an apocalyptic number.

It is an amenable number.

1853366861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1853366861 is an equidigital number, since it uses as much as digits as its factorization.

1853366861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 1853366861 is about 43050.7475080282. The cubic root of 1853366861 is about 1228.3452887512.

The spelling of 1853366861 in words is "one billion, eight hundred fifty-three million, three hundred sixty-six thousand, eight hundred sixty-one".