891220022198 has 8 divisors (see below), whose sum is σ = 1458360036360. Its totient is φ = 405100010080.

The previous prime is 891220022197. The next prime is 891220022261.

891220022198 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×891220022198² (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 (891220022197) 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, 20255000483 + ... + 20255000526.

It is an arithmetic number, because the mean of its divisors is an integer number (182295004545).

Almost surely, 2^891220022198 is an apocalyptic number.

891220022198 is a deficient number, since it is larger than the sum of its proper divisors (567140014162).

891220022198 is a wasteful number, since it uses less digits than its factorization.

891220022198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40510001022.

The product of its (nonzero) digits is 82944, while the sum is 44.

It can be divided in two parts, 8912200 and 22198, that added together give a palindrome (8934398).

The spelling of 891220022198 in words is "eight hundred ninety-one billion, two hundred twenty million, twenty-two thousand, one hundred ninety-eight".