6864039959 has 16 divisors (see below), whose sum is σ = 8260327680. Its totient is φ = 5571892800.

The previous prime is 6864039947. The next prime is 6864039971. The reversal of 6864039959 is 9599304686.

It is an interprime number because it is at equal distance from previous prime (6864039947) and next prime (6864039971).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6864039959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6864039898 and 6864039907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6864039929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481484 + ... + 495534.

It is an arithmetic number, because the mean of its divisors is an integer number (516270480).

Almost surely, 2^6864039959 is an apocalyptic number.

6864039959 is a deficient number, since it is larger than the sum of its proper divisors (1396287721).

6864039959 is a wasteful number, since it uses less digits than its factorization.

6864039959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17750.

The product of its (nonzero) digits is 12597120, while the sum is 59.

The square root of 6864039959 is about 82849.5018633184. The cubic root of 6864039959 is about 1900.4652562381.

The spelling of 6864039959 in words is "six billion, eight hundred sixty-four million, thirty-nine thousand, nine hundred fifty-nine".