812551273799 has 2 divisors, whose sum is σ = 812551273800. Its totient is φ = 812551273798.

The previous prime is 812551273771. The next prime is 812551273871. The reversal of 812551273799 is 997372155218.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812551273799 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812551773799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406275636899 + 406275636900.

It is an arithmetic number, because the mean of its divisors is an integer number (406275636900).

Almost surely, 2^812551273799 is an apocalyptic number.

812551273799 is a deficient number, since it is larger than the sum of its proper divisors (1).

812551273799 is an equidigital number, since it uses as much as digits as its factorization.

812551273799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 59.

The spelling of 812551273799 in words is "eight hundred twelve billion, five hundred fifty-one million, two hundred seventy-three thousand, seven hundred ninety-nine".