198255326816 has 96 divisors (see below), whose sum is σ = 423640391328. Its totient is φ = 90959708160.

The previous prime is 198255326809. The next prime is 198255326827. The reversal of 198255326816 is 618623552891.

It is a super-2 number, since 2×198255326816² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59839976 + ... + 59843288.

It is an arithmetic number, because the mean of its divisors is an integer number (4412920743).

Almost surely, 2^198255326816 is an apocalyptic number.

198255326816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198255326816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211820195664).

198255326816 is an abundant number, since it is smaller than the sum of its proper divisors (225385064512).

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

198255326816 is a wasteful number, since it uses less digits than its factorization.

198255326816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6064 (or 6056 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 56.

The spelling of 198255326816 in words is "one hundred ninety-eight billion, two hundred fifty-five million, three hundred twenty-six thousand, eight hundred sixteen".