6847781899 has 12 divisors (see below), whose sum is σ = 8018549328. Its totient is φ = 5830650000.

The previous prime is 6847781893. The next prime is 6847781909. The reversal of 6847781899 is 9981877486.

It is not a de Polignac number, because 6847781899 - 2³ = 6847781891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6847781891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 455352 + ... + 470149.

It is an arithmetic number, because the mean of its divisors is an integer number (668212444).

Almost surely, 2^6847781899 is an apocalyptic number.

6847781899 is a deficient number, since it is larger than the sum of its proper divisors (1170767429).

6847781899 is a wasteful number, since it uses less digits than its factorization.

6847781899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925666 (or 925659 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 67.

The square root of 6847781899 is about 82751.3256630974. The cubic root of 6847781899 is about 1898.9635990387.

The spelling of 6847781899 in words is "six billion, eight hundred forty-seven million, seven hundred eighty-one thousand, eight hundred ninety-nine".