2851493857 has 2 divisors, whose sum is σ = 2851493858. Its totient is φ = 2851493856.

The previous prime is 2851493831. The next prime is 2851493923. The reversal of 2851493857 is 7583941582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2535223201 + 316270656 = 50351^2 + 17784^2 .

It is a cyclic number.

It is not a de Polignac number, because 2851493857 - 2²³ = 2843105249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2851493257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1425746928 + 1425746929.

It is an arithmetic number, because the mean of its divisors is an integer number (1425746929).

Almost surely, 2^2851493857 is an apocalyptic number.

It is an amenable number.

2851493857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2851493857 is an equidigital number, since it uses as much as digits as its factorization.

2851493857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 52.

The square root of 2851493857 is about 53399.3806799292. The cubic root of 2851493857 is about 1418.0476139201.

The spelling of 2851493857 in words is "two billion, eight hundred fifty-one million, four hundred ninety-three thousand, eight hundred fifty-seven".