822138966197 has 4 divisors (see below), whose sum is σ = 822195982560. Its totient is φ = 822081949836.

The previous prime is 822138966193. The next prime is 822138966221. The reversal of 822138966197 is 791669831228.

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 822138966197 - 2² = 822138966193 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 (822138966193) 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, 28486547 + ... + 28515392.

It is an arithmetic number, because the mean of its divisors is an integer number (205548995640).

Almost surely, 2^822138966197 is an apocalyptic number.

It is an amenable number.

822138966197 is a deficient number, since it is larger than the sum of its proper divisors (57016363).

822138966197 is a wasteful number, since it uses less digits than its factorization.

822138966197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57016362.

The product of its digits is 15676416, while the sum is 62.

The spelling of 822138966197 in words is "eight hundred twenty-two billion, one hundred thirty-eight million, nine hundred sixty-six thousand, one hundred ninety-seven".