2681542843 has 4 divisors (see below), whose sum is σ = 3064620400. Its totient is φ = 2298465288.

The previous prime is 2681542819. The next prime is 2681542849. The reversal of 2681542843 is 3482451862.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-2681542843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2681542843.

It is not an unprimeable number, because it can be changed into a prime (2681542849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191538768 + ... + 191538781.

It is an arithmetic number, because the mean of its divisors is an integer number (766155100).

Almost surely, 2^2681542843 is an apocalyptic number.

2681542843 is a deficient number, since it is larger than the sum of its proper divisors (383077557).

2681542843 is an equidigital number, since it uses as much as digits as its factorization.

2681542843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383077556.

The product of its digits is 368640, while the sum is 43.

The square root of 2681542843 is about 51783.6155844684. The cubic root of 2681542843 is about 1389.2964096120.

The spelling of 2681542843 in words is "two billion, six hundred eighty-one million, five hundred forty-two thousand, eight hundred forty-three".