812722436326 has 4 divisors (see below), whose sum is σ = 1219083654492. Its totient is φ = 406361218162.

The previous prime is 812722436321. The next prime is 812722436333. The reversal of 812722436326 is 623634227218.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812722436321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203180609080 + ... + 203180609083.

It is an arithmetic number, because the mean of its divisors is an integer number (304770913623).

Almost surely, 2^812722436326 is an apocalyptic number.

812722436326 is a deficient number, since it is larger than the sum of its proper divisors (406361218166).

812722436326 is a wasteful number, since it uses less digits than its factorization.

812722436326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406361218165.

The product of its digits is 1161216, while the sum is 46.

The spelling of 812722436326 in words is "eight hundred twelve billion, seven hundred twenty-two million, four hundred thirty-six thousand, three hundred twenty-six".