6864774685 has 4 divisors (see below), whose sum is σ = 8237729628. Its totient is φ = 5491819744.

The previous prime is 6864774677. The next prime is 6864774691. The reversal of 6864774685 is 5864774686.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5040716004 + 1824058681 = 70998^2 + 42709^2 .

It is a cyclic number.

It is not a de Polignac number, because 6864774685 - 2³ = 6864774677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686477464 + ... + 686477473.

It is an arithmetic number, because the mean of its divisors is an integer number (2059432407).

Almost surely, 2^6864774685 is an apocalyptic number.

It is an amenable number.

6864774685 is a deficient number, since it is larger than the sum of its proper divisors (1372954943).

6864774685 is a wasteful number, since it uses less digits than its factorization.

6864774685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372954942.

The product of its digits is 54190080, while the sum is 61.

The square root of 6864774685 is about 82853.9358449555. The cubic root of 6864774685 is about 1900.5330623419.

Subtracting from 6864774685 its reverse (5864774686), we obtain a palindrome (999999999).

The spelling of 6864774685 in words is "six billion, eight hundred sixty-four million, seven hundred seventy-four thousand, six hundred eighty-five".