6859240681 has 4 divisors (see below), whose sum is σ = 6861412432. Its totient is φ = 6857068932.

The previous prime is 6859240657. The next prime is 6859240697. The reversal of 6859240681 is 1860429586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6859240681 is a prime.

It is a super-2 number, since 2×6859240681² = 94098365439770687522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6859244681) 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, 1081131 + ... + 1087456.

It is an arithmetic number, because the mean of its divisors is an integer number (1715353108).

Almost surely, 2^6859240681 is an apocalyptic number.

It is an amenable number.

6859240681 is a deficient number, since it is larger than the sum of its proper divisors (2171751).

6859240681 is a wasteful number, since it uses less digits than its factorization.

6859240681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171750.

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 6859240681 is about 82820.5329673747. The cubic root of 6859240681 is about 1900.0222232858.

The spelling of 6859240681 in words is "six billion, eight hundred fifty-nine million, two hundred forty thousand, six hundred eighty-one".