819836579281 has 2 divisors, whose sum is σ = 819836579282. Its totient is φ = 819836579280.

The previous prime is 819836579269. The next prime is 819836579357. The reversal of 819836579281 is 182975638918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815869595025 + 3966984256 = 903255^2 + 62984^2 .

It is a cyclic number.

It is not a de Polignac number, because 819836579281 - 2²⁵ = 819803024849 is a prime.

It is a super-2 number, since 2×819836579281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (819836579251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409918289640 + 409918289641.

It is an arithmetic number, because the mean of its divisors is an integer number (409918289641).

Almost surely, 2^819836579281 is an apocalyptic number.

It is an amenable number.

819836579281 is a deficient number, since it is larger than the sum of its proper divisors (1).

819836579281 is an equidigital number, since it uses as much as digits as its factorization.

819836579281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 67.

The spelling of 819836579281 in words is "eight hundred nineteen billion, eight hundred thirty-six million, five hundred seventy-nine thousand, two hundred eighty-one".