2198633646 has 128 divisors (see below), whose sum is σ = 5100060672. Its totient is φ = 631039200.

The previous prime is 2198633599. The next prime is 2198633683. The reversal of 2198633646 is 6463368912.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2198633595 and 2198633604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20547925 + ... + 20548031.

It is an arithmetic number, because the mean of its divisors is an integer number (39844224).

Almost surely, 2^2198633646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2198633646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2550030336).

2198633646 is an abundant number, since it is smaller than the sum of its proper divisors (2901427026).

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

2198633646 is a wasteful number, since it uses less digits than its factorization.

2198633646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 237 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 2198633646 is about 46889.5899534214. The cubic root of 2198633646 is about 1300.3221383139.

The spelling of 2198633646 in words is "two billion, one hundred ninety-eight million, six hundred thirty-three thousand, six hundred forty-six".