6812839985 has 16 divisors (see below), whose sum is σ = 9379691136. Its totient is φ = 4653477888.

The previous prime is 6812839967. The next prime is 6812840009. The reversal of 6812839985 is 5899382186.

It is a cyclic number.

It is not a de Polignac number, because 6812839985 - 2¹⁴ = 6812823601 is a prime.

It is a super-2 number, since 2×6812839985² = 92829577322429600450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369707 + ... + 387696.

It is an arithmetic number, because the mean of its divisors is an integer number (586230696).

Almost surely, 2^6812839985 is an apocalyptic number.

It is an amenable number.

6812839985 is a deficient number, since it is larger than the sum of its proper divisors (2566851151).

6812839985 is a wasteful number, since it uses less digits than its factorization.

6812839985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757672.

The product of its digits is 7464960, while the sum is 59.

The square root of 6812839985 is about 82539.9296401445. The cubic root of 6812839985 is about 1895.7281667745.

The spelling of 6812839985 in words is "six billion, eight hundred twelve million, eight hundred thirty-nine thousand, nine hundred eighty-five".