812420264818 has 8 divisors (see below), whose sum is σ = 1219167482220. Its totient is φ = 406031104080.

The previous prime is 812420264813. The next prime is 812420264819. The reversal of 812420264818 is 818462024218.

It can be written as a sum of positive squares in 2 ways, for example, as 573771405529 + 238648859289 = 757477^2 + 488517^2 .

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

It is not an unprimeable number, because it can be changed into a prime (812420264813) 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 in 3 ways as a sum of consecutive naturals, for example, 89508493 + ... + 89517568.

Almost surely, 2^812420264818 is an apocalyptic number.

812420264818 is a deficient number, since it is larger than the sum of its proper divisors (406747217402).

812420264818 is a wasteful number, since it uses less digits than its factorization.

812420264818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179028332.

The product of its (nonzero) digits is 393216, while the sum is 46.

The spelling of 812420264818 in words is "eight hundred twelve billion, four hundred twenty million, two hundred sixty-four thousand, eight hundred eighteen".