6851981089 has 8 divisors (see below), whose sum is σ = 6907857920. Its totient is φ = 6796134576.

The previous prime is 6851981063. The next prime is 6851981161. The reversal of 6851981089 is 9801891586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6851981089 - 2²⁷ = 6717763361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6851981489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747667 + ... + 756775.

It is an arithmetic number, because the mean of its divisors is an integer number (863482240).

Almost surely, 2^6851981089 is an apocalyptic number.

It is an amenable number.

6851981089 is a deficient number, since it is larger than the sum of its proper divisors (55876831).

6851981089 is a wasteful number, since it uses less digits than its factorization.

6851981089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15159.

The product of its (nonzero) digits is 1244160, while the sum is 55.

The square root of 6851981089 is about 82776.6941173662. The cubic root of 6851981089 is about 1899.3516799127.

The spelling of 6851981089 in words is "six billion, eight hundred fifty-one million, nine hundred eighty-one thousand, eighty-nine".