6879540636 has 18 divisors (see below), whose sum is σ = 17389950032. Its totient is φ = 2293180200.

The previous prime is 6879540611. The next prime is 6879540643. The reversal of 6879540636 is 6360459786.

6879540636 is a `hidden beast` number, since 68 + 7 + 9 + 540 + 6 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95549140 + ... + 95549211.

Almost surely, 2^6879540636 is an apocalyptic number.

It is an amenable number.

6879540636 is an abundant number, since it is smaller than the sum of its proper divisors (10510409396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6879540636 is a wasteful number, since it uses less digits than its factorization.

6879540636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191098361 (or 191098356 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The square root of 6879540636 is about 82942.9963046911. The cubic root of 6879540636 is about 1901.8947521431.

The spelling of 6879540636 in words is "six billion, eight hundred seventy-nine million, five hundred forty thousand, six hundred thirty-six".