6868639211 has 4 divisors (see below), whose sum is σ = 7849873392. Its totient is φ = 5887405032.

The previous prime is 6868639207. The next prime is 6868639273. The reversal of 6868639211 is 1129368686.

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

It is a cyclic number.

It is not a de Polignac number, because 6868639211 - 2² = 6868639207 is a prime.

It is a super-2 number, since 2×6868639211² = 94356409221773405042, which contains 22 as substring.

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 6868639211.

It is not an unprimeable number, because it can be changed into a prime (6868639111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490617080 + ... + 490617093.

It is an arithmetic number, because the mean of its divisors is an integer number (1962468348).

Almost surely, 2^6868639211 is an apocalyptic number.

6868639211 is a deficient number, since it is larger than the sum of its proper divisors (981234181).

6868639211 is an equidigital number, since it uses as much as digits as its factorization.

6868639211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981234180.

The product of its digits is 746496, while the sum is 50.

The square root of 6868639211 is about 82877.2538818704. The cubic root of 6868639211 is about 1900.8896305700.

The spelling of 6868639211 in words is "six billion, eight hundred sixty-eight million, six hundred thirty-nine thousand, two hundred eleven".