2194691738 has 8 divisors (see below), whose sum is σ = 3485686932. Its totient is φ = 1032796096.

The previous prime is 2194691701. The next prime is 2194691753. The reversal of 2194691738 is 8371964912.

It can be written as a sum of positive squares in 2 ways, for example, as 2166250849 + 28440889 = 46543^2 + 5333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32274845 + ... + 32274912.

Almost surely, 2^2194691738 is an apocalyptic number.

2194691738 is a deficient number, since it is larger than the sum of its proper divisors (1290995194).

2194691738 is a wasteful number, since it uses less digits than its factorization.

2194691738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64549776.

The product of its digits is 653184, while the sum is 50.

The square root of 2194691738 is about 46847.5371604527. The cubic root of 2194691738 is about 1299.5445619609.

The spelling of 2194691738 in words is "two billion, one hundred ninety-four million, six hundred ninety-one thousand, seven hundred thirty-eight".