812485973805 has 64 divisors (see below), whose sum is σ = 1426958588160. Its totient is φ = 391491993600.

The previous prime is 812485973797. The next prime is 812485973833. The reversal of 812485973805 is 508379584218.

It is not a de Polignac number, because 812485973805 - 2³ = 812485973797 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32501251 + ... + 32526239.

It is an arithmetic number, because the mean of its divisors is an integer number (22296227940).

Almost surely, 2^812485973805 is an apocalyptic number.

It is an amenable number.

812485973805 is a deficient number, since it is larger than the sum of its proper divisors (614472614355).

812485973805 is a wasteful number, since it uses less digits than its factorization.

812485973805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26222.

The product of its (nonzero) digits is 19353600, while the sum is 60.

The spelling of 812485973805 in words is "eight hundred twelve billion, four hundred eighty-five million, nine hundred seventy-three thousand, eight hundred five".