812041787215 has 16 divisors (see below), whose sum is σ = 992903673888. Its totient is φ = 637332748416.

The previous prime is 812041787159. The next prime is 812041787233. The reversal of 812041787215 is 512787140218.

It is a cyclic number.

It is not a de Polignac number, because 812041787215 - 2¹¹ = 812041785167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4110904 + ... + 4303906.

It is an arithmetic number, because the mean of its divisors is an integer number (62056479618).

Almost surely, 2^812041787215 is an apocalyptic number.

812041787215 is a deficient number, since it is larger than the sum of its proper divisors (180861886673).

812041787215 is a wasteful number, since it uses less digits than its factorization.

812041787215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208938.

The product of its (nonzero) digits is 250880, while the sum is 46.

The spelling of 812041787215 in words is "eight hundred twelve billion, forty-one million, seven hundred eighty-seven thousand, two hundred fifteen".