853449868993 has 2 divisors, whose sum is σ = 853449868994. Its totient is φ = 853449868992.

The previous prime is 853449868987. The next prime is 853449869087. The reversal of 853449868993 is 399868944358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 746041605169 + 107408263824 = 863737^2 + 327732^2 .

It is a cyclic number.

It is not a de Polignac number, because 853449868993 - 2⁵ = 853449868961 is a prime.

It is not a weakly prime, because it can be changed into another prime (853449868913) 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, 426724934496 + 426724934497.

It is an arithmetic number, because the mean of its divisors is an integer number (426724934497).

Almost surely, 2^853449868993 is an apocalyptic number.

It is an amenable number.

853449868993 is a deficient number, since it is larger than the sum of its proper divisors (1).

853449868993 is an equidigital number, since it uses as much as digits as its factorization.

853449868993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612431360, while the sum is 76.

The spelling of 853449868993 in words is "eight hundred fifty-three billion, four hundred forty-nine million, eight hundred sixty-eight thousand, nine hundred ninety-three".