822138966198 has 96 divisors (see below), whose sum is σ = 1981834283520. Its totient is φ = 244193901120.

The previous prime is 822138966193. The next prime is 822138966221. The reversal of 822138966198 is 891669831228.

822138966198 is a `hidden beast` number, since 8 + 2 + 2 + 1 + 3 + 8 + 9 + 6 + 619 + 8 = 666.

It is a super-2 number, since 2×822138966198² (a number of 25 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 10865565 + ... + 10940967.

It is an arithmetic number, because the mean of its divisors is an integer number (20644107120).

Almost surely, 2^822138966198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 822138966198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990917141760).

822138966198 is an abundant number, since it is smaller than the sum of its proper divisors (1159695317322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

822138966198 is a wasteful number, since it uses less digits than its factorization.

822138966198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76514 (or 76511 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The spelling of 822138966198 in words is "eight hundred twenty-two billion, one hundred thirty-eight million, nine hundred sixty-six thousand, one hundred ninety-eight".