2081288643 has 16 divisors (see below), whose sum is σ = 3175983360. Its totient is φ = 1187621856.

The previous prime is 2081288621. The next prime is 2081288687. The reversal of 2081288643 is 3468821802.

It is a happy number.

It is not a de Polignac number, because 2081288643 - 2¹⁰ = 2081287619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2081288595 and 2081288604.

It is not an unprimeable number, because it can be changed into a prime (2081288743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55005 + ... + 84782.

It is an arithmetic number, because the mean of its divisors is an integer number (198498960).

Almost surely, 2^2081288643 is an apocalyptic number.

2081288643 is a deficient number, since it is larger than the sum of its proper divisors (1094694717).

2081288643 is a wasteful number, since it uses less digits than its factorization.

2081288643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140506.

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 2081288643 is about 45621.1424999418. The cubic root of 2081288643 is about 1276.7644197575.

The spelling of 2081288643 in words is "two billion, eighty-one million, two hundred eighty-eight thousand, six hundred forty-three".