812263478968901 has 4 divisors (see below), whose sum is σ = 814148081008704. Its totient is φ = 810378876929100.

The previous prime is 812263478968889. The next prime is 812263478968969. The reversal of 812263478968901 is 109869874362218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 812263478968901 - 2¹⁰ = 812263478967877 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 (812263472968901) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 942301019255 + ... + 942301020116.

It is an arithmetic number, because the mean of its divisors is an integer number (203537020252176).

Almost surely, 2^{812263478968901} is an apocalyptic number.

It is an amenable number.

812263478968901 is a deficient number, since it is larger than the sum of its proper divisors (1884602039803).

812263478968901 is a wasteful number, since it uses less digits than its factorization.

812263478968901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884602039802.

The product of its (nonzero) digits is 501645312, while the sum is 74.

The spelling of 812263478968901 in words is "eight hundred twelve trillion, two hundred sixty-three billion, four hundred seventy-eight million, nine hundred sixty-eight thousand, nine hundred one".