7864322689 has 8 divisors (see below), whose sum is σ = 8614065960. Its totient is φ = 7146483456.

The previous prime is 7864322671. The next prime is 7864322707. The reversal of 7864322689 is 9862234687.

It is an interprime number because it is at equal distance from previous prime (7864322671) and next prime (7864322707).

It can be written as a sum of positive squares in 4 ways, for example, as 366148225 + 7498174464 = 19135^2 + 86592^2 .

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

It is not a de Polignac number, because 7864322689 - 2⁷ = 7864322561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7864322659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7975494 + ... + 7976479.

It is an arithmetic number, because the mean of its divisors is an integer number (1076758245).

Almost surely, 2^7864322689 is an apocalyptic number.

It is an amenable number.

7864322689 is a deficient number, since it is larger than the sum of its proper divisors (749743271).

7864322689 is a wasteful number, since it uses less digits than its factorization.

7864322689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15952019.

The product of its digits is 6967296, while the sum is 55.

The square root of 7864322689 is about 88681.0165086080. The cubic root of 7864322689 is about 1988.6290304638.

The spelling of 7864322689 in words is "seven billion, eight hundred sixty-four million, three hundred twenty-two thousand, six hundred eighty-nine".