819117291882 has 64 divisors (see below), whose sum is σ = 1750592062080. Its totient is φ = 255015984384.

The previous prime is 819117291869. The next prime is 819117291893. The reversal of 819117291882 is 288192711918.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 746053 + ... + 1481495.

It is an arithmetic number, because the mean of its divisors is an integer number (27353000970).

Almost surely, 2^819117291882 is an apocalyptic number.

819117291882 is an abundant number, since it is smaller than the sum of its proper divisors (931474770198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

819117291882 is a wasteful number, since it uses less digits than its factorization.

819117291882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735687.

The product of its digits is 1161216, while the sum is 57.

The spelling of 819117291882 in words is "eight hundred nineteen billion, one hundred seventeen million, two hundred ninety-one thousand, eight hundred eighty-two".