7991832636 has 36 divisors (see below), whose sum is σ = 20355799464. Its totient is φ = 2643607200.

The previous prime is 7991832599. The next prime is 7991832647. The reversal of 7991832636 is 6362381997.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 842595 + ... + 852026.

It is an arithmetic number, because the mean of its divisors is an integer number (565438874).

Almost surely, 2^7991832636 is an apocalyptic number.

It is an amenable number.

7991832636 is an abundant number, since it is smaller than the sum of its proper divisors (12363966828).

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

7991832636 is a wasteful number, since it uses less digits than its factorization.

7991832636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694762 (or 1694757 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 7991832636 is about 89397.0504882572. The cubic root of 7991832636 is about 1999.3191545844.

The spelling of 7991832636 in words is "seven billion, nine hundred ninety-one million, eight hundred thirty-two thousand, six hundred thirty-six".