2193671643 has 16 divisors (see below), whose sum is σ = 2983115520. Its totient is φ = 1433394144.

The previous prime is 2193671639. The next prime is 2193671707. The reversal of 2193671643 is 3461763912.

It is not a de Polignac number, because 2193671643 - 2² = 2193671639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2193671595 and 2193671604.

It is not an unprimeable number, because it can be changed into a prime (2193671603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162528 + ... + 175506.

It is an arithmetic number, because the mean of its divisors is an integer number (186444720).

Almost surely, 2^2193671643 is an apocalyptic number.

2193671643 is a deficient number, since it is larger than the sum of its proper divisors (789443877).

2193671643 is a wasteful number, since it uses less digits than its factorization.

2193671643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14098.

The product of its digits is 163296, while the sum is 42.

The square root of 2193671643 is about 46836.6485030686. The cubic root of 2193671643 is about 1299.3431875371.

The spelling of 2193671643 in words is "two billion, one hundred ninety-three million, six hundred seventy-one thousand, six hundred forty-three".