4991804856 has 24 divisors (see below), whose sum is σ = 13519471680. Its totient is φ = 1663934928.

The previous prime is 4991804833. The next prime is 4991804869. The reversal of 4991804856 is 6584081994.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34665240 + ... + 34665383.

It is an arithmetic number, because the mean of its divisors is an integer number (563311320).

Almost surely, 2^4991804856 is an apocalyptic number.

It is an amenable number.

4991804856 is an abundant number, since it is smaller than the sum of its proper divisors (8527666824).

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

4991804856 is a wasteful number, since it uses less digits than its factorization.

4991804856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69330635 (or 69330628 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 4991804856 is about 70652.7059354417. The cubic root of 4991804856 is about 1709.0412025250.

The spelling of 4991804856 in words is "four billion, nine hundred ninety-one million, eight hundred four thousand, eight hundred fifty-six".