198849210845784 has 512 divisors, whose sum is σ = 533899317288960. Its totient is φ = 61638100070400.

The previous prime is 198849210845783. The next prime is 198849210845801. The reversal of 198849210845784 is 487548012948891.

It is a super-2 number, since 2×198849210845784² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198849210845783) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 80603651319 + ... + 80603653785.

It is an arithmetic number, because the mean of its divisors is an integer number (1042772104080).

Almost surely, 2^{198849210845784} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198849210845784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266949658644480).

198849210845784 is an abundant number, since it is smaller than the sum of its proper divisors (335050106443176).

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

198849210845784 is a wasteful number, since it uses less digits than its factorization.

198849210845784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951 (or 2947 counting only the distinct ones).

The product of its (nonzero) digits is 1486356480, while the sum is 78.

The spelling of 198849210845784 in words is "one hundred ninety-eight trillion, eight hundred forty-nine billion, two hundred ten million, eight hundred forty-five thousand, seven hundred eighty-four".