2193671641 has 6 divisors (see below), whose sum is σ = 2551822170. Its totient is φ = 1880289936.

The previous prime is 2193671639. The next prime is 2193671707. The reversal of 2193671641 is 1461763912.

It can be written as a sum of positive squares in only one way, i.e., 1880523225 + 313148416 = 43365^2 + 17696^2 .

It is not a de Polignac number, because 2193671641 - 2¹ = 2193671639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2193671594 and 2193671603.

It is not an unprimeable number, because it can be changed into a prime (2193671141) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 22384356 + ... + 22384453.

It is an arithmetic number, because the mean of its divisors is an integer number (425303695).

Almost surely, 2^2193671641 is an apocalyptic number.

It is an amenable number.

2193671641 is a deficient number, since it is larger than the sum of its proper divisors (358150529).

2193671641 is an equidigital number, since it uses as much as digits as its factorization.

2193671641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44768823 (or 44768816 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 2193671641 is about 46836.6484817178. The cubic root of 2193671641 is about 1299.3431871422.

The spelling of 2193671641 in words is "two billion, one hundred ninety-three million, six hundred seventy-one thousand, six hundred forty-one".