4991009806 has 16 divisors (see below), whose sum is σ = 7651171584. Its totient is φ = 2440693944.

The previous prime is 4991009797. The next prime is 4991009831. The reversal of 4991009806 is 6089001994.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121501 + ... + 157303.

It is an arithmetic number, because the mean of its divisors is an integer number (478198224).

Almost surely, 2^4991009806 is an apocalyptic number.

4991009806 is a deficient number, since it is larger than the sum of its proper divisors (2660161778).

4991009806 is a wasteful number, since it uses less digits than its factorization.

4991009806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37335.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 4991009806 is about 70647.0792460665. The cubic root of 4991009806 is about 1708.9504641120.

The spelling of 4991009806 in words is "four billion, nine hundred ninety-one million, nine thousand, eight hundred six".