2196811680394 has 4 divisors (see below), whose sum is σ = 3295217520594. Its totient is φ = 1098405840196.

The previous prime is 2196811680389. The next prime is 2196811680493. The reversal of 2196811680394 is 4930861186912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2114514414769 + 82297265625 = 1454137^2 + 286875^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549202920097 + ... + 549202920100.

Almost surely, 2^{2196811680394} is an apocalyptic number.

2196811680394 is a deficient number, since it is larger than the sum of its proper divisors (1098405840200).

2196811680394 is a wasteful number, since it uses less digits than its factorization.

2196811680394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098405840199.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 2196811680394 in words is "two trillion, one hundred ninety-six billion, eight hundred eleven million, six hundred eighty thousand, three hundred ninety-four".