2161626198 has 32 divisors (see below), whose sum is σ = 4371014016. Its totient is φ = 712604928.

The previous prime is 2161626161. The next prime is 2161626223. The reversal of 2161626198 is 8916261612.

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, 429565 + ... + 434567.

It is an arithmetic number, because the mean of its divisors is an integer number (136594188).

Almost surely, 2^2161626198 is an apocalyptic number.

2161626198 is an abundant number, since it is smaller than the sum of its proper divisors (2209387818).

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

2161626198 is a wasteful number, since it uses less digits than its factorization.

2161626198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788.

The product of its digits is 62208, while the sum is 42.

The square root of 2161626198 is about 46493.2919677667. The cubic root of 2161626198 is about 1292.9851342521.

The spelling of 2161626198 in words is "two billion, one hundred sixty-one million, six hundred twenty-six thousand, one hundred ninety-eight".