812822518180 has 24 divisors (see below), whose sum is σ = 1746623273472. Its totient is φ = 317567867232.

The previous prime is 812822518159. The next prime is 812822518199. The reversal of 812822518180 is 81815228218.

It is a self number, because there is not a number n which added to its sum of digits gives 812822518180.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472570372 + ... + 472572091.

It is an arithmetic number, because the mean of its divisors is an integer number (72775969728).

Almost surely, 2^812822518180 is an apocalyptic number.

It is an amenable number.

812822518180 is an abundant number, since it is smaller than the sum of its proper divisors (933800755292).

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

812822518180 is a wasteful number, since it uses less digits than its factorization.

812822518180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945142515 (or 945142513 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 46.

The spelling of 812822518180 in words is "eight hundred twelve billion, eight hundred twenty-two million, five hundred eighteen thousand, one hundred eighty".