4991199985 has 24 divisors (see below), whose sum is σ = 6406251840. Its totient is φ = 3726053760.

The previous prime is 4991199979. The next prime is 4991200001. The reversal of 4991199985 is 5899911994.

It is not a de Polignac number, because 4991199985 - 2³ = 4991199977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180406 + ... + 206224.

It is an arithmetic number, because the mean of its divisors is an integer number (266927160).

Almost surely, 2^4991199985 is an apocalyptic number.

It is an amenable number.

4991199985 is a deficient number, since it is larger than the sum of its proper divisors (1415051855).

4991199985 is a wasteful number, since it uses less digits than its factorization.

4991199985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25929 (or 25888 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 64.

The square root of 4991199985 is about 70648.4252124561. The cubic root of 4991199985 is about 1708.9721699641.

The spelling of 4991199985 in words is "four billion, nine hundred ninety-one million, one hundred ninety-nine thousand, nine hundred eighty-five".