6539678636 has 12 divisors (see below), whose sum is σ = 11491926600. Its totient is φ = 3256271040.

The previous prime is 6539678633. The next prime is 6539678659. The reversal of 6539678636 is 6368769356.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6539678633) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3390986 + ... + 3392913.

It is an arithmetic number, because the mean of its divisors is an integer number (957660550).

Almost surely, 2^6539678636 is an apocalyptic number.

It is an amenable number.

6539678636 is a deficient number, since it is larger than the sum of its proper divisors (4952247964).

6539678636 is a wasteful number, since it uses less digits than its factorization.

6539678636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6784144 (or 6784142 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 59.

The square root of 6539678636 is about 80868.2795414865. The cubic root of 6539678636 is about 1870.0453377247.

The spelling of 6539678636 in words is "six billion, five hundred thirty-nine million, six hundred seventy-eight thousand, six hundred thirty-six".