6539808894 has 32 divisors (see below), whose sum is σ = 13404043296. Its totient is φ = 2125908480.

The previous prime is 6539808881. The next prime is 6539808907. The reversal of 6539808894 is 4988089356.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6539808881) and next prime (6539808907).

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 15 ways as a sum of consecutive naturals, for example, 950314 + ... + 957170.

It is an arithmetic number, because the mean of its divisors is an integer number (418876353).

Almost surely, 2^6539808894 is an apocalyptic number.

6539808894 is an abundant number, since it is smaller than the sum of its proper divisors (6864234402).

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

6539808894 is a wasteful number, since it uses less digits than its factorization.

6539808894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10780.

The product of its (nonzero) digits is 14929920, while the sum is 60.

The square root of 6539808894 is about 80869.0849088822. The cubic root of 6539808894 is about 1870.0577535615.

The spelling of 6539808894 in words is "six billion, five hundred thirty-nine million, eight hundred eight thousand, eight hundred ninety-four".