2194944639 has 8 divisors (see below), whose sum is σ = 2974570032. Its totient is φ = 1439307840.

The previous prime is 2194944601. The next prime is 2194944641. The reversal of 2194944639 is 9364494912.

2194944639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2194944639 - 2⁸ = 2194944383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2194944591 and 2194944600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194944139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5996934 + ... + 5997299.

It is an arithmetic number, because the mean of its divisors is an integer number (371821254).

Almost surely, 2^2194944639 is an apocalyptic number.

2194944639 is a deficient number, since it is larger than the sum of its proper divisors (779625393).

2194944639 is a wasteful number, since it uses less digits than its factorization.

2194944639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11994297.

The product of its digits is 1679616, while the sum is 51.

The square root of 2194944639 is about 46850.2362747511. The cubic root of 2194944639 is about 1299.5944768670.

The spelling of 2194944639 in words is "two billion, one hundred ninety-four million, nine hundred forty-four thousand, six hundred thirty-nine".