2196691906 has 16 divisors (see below), whose sum is σ = 3314203200. Its totient is φ = 1091976048.

The previous prime is 2196691883. The next prime is 2196691909. The reversal of 2196691906 is 6091966912.

It is a self number, because there is not a number n which added to its sum of digits gives 2196691906.

It is not an unprimeable number, because it can be changed into a prime (2196691909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252985 + ... + 261523.

It is an arithmetic number, because the mean of its divisors is an integer number (207137700).

Almost surely, 2^2196691906 is an apocalyptic number.

2196691906 is a deficient number, since it is larger than the sum of its proper divisors (1117511294).

2196691906 is a wasteful number, since it uses less digits than its factorization.

2196691906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9273.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 2196691906 is about 46868.8799311441. The cubic root of 2196691906 is about 1299.9392291119.

The spelling of 2196691906 in words is "two billion, one hundred ninety-six million, six hundred ninety-one thousand, nine hundred six".