812006720585101 has 4 divisors (see below), whose sum is σ = 812007091303452. Its totient is φ = 812006349866752.

The previous prime is 812006720585033. The next prime is 812006720585117. The reversal of 812006720585101 is 101585027600218.

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

It can be written as a sum of positive squares in 2 ways, for example, as 392168710562500 + 419838010022601 = 19803250^2 + 20489949^2 .

It is a cyclic number.

It is not a de Polignac number, because 812006720585101 - 2⁷ = 812006720584973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812006720585191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182053990 + ... + 186460903.

It is an arithmetic number, because the mean of its divisors is an integer number (203001772825863).

Almost surely, 2^{812006720585101} is an apocalyptic number.

It is an amenable number.

812006720585101 is a deficient number, since it is larger than the sum of its proper divisors (370718351).

812006720585101 is a wasteful number, since it uses less digits than its factorization.

812006720585101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370718350.

The product of its (nonzero) digits is 268800, while the sum is 46.

The spelling of 812006720585101 in words is "eight hundred twelve trillion, six billion, seven hundred twenty million, five hundred eighty-five thousand, one hundred one".