812518068266 has 8 divisors (see below), whose sum is σ = 1221910206660. Its totient is φ = 405214666048.

The previous prime is 812518068199. The next prime is 812518068287. The reversal of 812518068266 is 662860815218.

It can be written as a sum of positive squares in 2 ways, for example, as 798101023225 + 14417045041 = 893365^2 + 120071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×812518068266² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522183071 + ... + 522184626.

Almost surely, 2^812518068266 is an apocalyptic number.

812518068266 is a deficient number, since it is larger than the sum of its proper divisors (409392138394).

812518068266 is a wasteful number, since it uses less digits than its factorization.

812518068266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044368088.

The product of its (nonzero) digits is 2211840, while the sum is 53.

The spelling of 812518068266 in words is "eight hundred twelve billion, five hundred eighteen million, sixty-eight thousand, two hundred sixty-six".