812945549218 has 12 divisors (see below), whose sum is σ = 1340352372870. Its totient is φ = 369520704080.

The previous prime is 812945549201. The next prime is 812945549231.

812945549218 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 807404682249 + 5540866969 = 898557^2 + 74437^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1679639323 + ... + 1679639806.

Almost surely, 2^812945549218 is an apocalyptic number.

812945549218 is a deficient number, since it is larger than the sum of its proper divisors (527406823652).

812945549218 is a wasteful number, since it uses less digits than its factorization.

812945549218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359279153 (or 3359279142 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 58.

The spelling of 812945549218 in words is "eight hundred twelve billion, nine hundred forty-five million, five hundred forty-nine thousand, two hundred eighteen".