812551273822 has 16 divisors (see below), whose sum is σ = 1221479683200. Its totient is φ = 405392067288.

The previous prime is 812551273799. The next prime is 812551273871. The reversal of 812551273822 is 228372155218.

It is a congruent number.

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, 2209753 + ... + 2551099.

It is an arithmetic number, because the mean of its divisors is an integer number (76342480200).

Almost surely, 2^812551273822 is an apocalyptic number.

812551273822 is a deficient number, since it is larger than the sum of its proper divisors (408928409378).

812551273822 is a wasteful number, since it uses less digits than its factorization.

812551273822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343935.

The product of its digits is 537600, while the sum is 46.

The spelling of 812551273822 in words is "eight hundred twelve billion, five hundred fifty-one million, two hundred seventy-three thousand, eight hundred twenty-two".