4991145166 has 32 divisors (see below), whose sum is σ = 9039651840. Its totient is φ = 2021351136.

The previous prime is 4991145161. The next prime is 4991145193. The reversal of 4991145166 is 6615411994.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991145161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111700 + ... + 149863.

It is an arithmetic number, because the mean of its divisors is an integer number (282489120).

Almost surely, 2^4991145166 is an apocalyptic number.

4991145166 is a deficient number, since it is larger than the sum of its proper divisors (4048506674).

4991145166 is a wasteful number, since it uses less digits than its factorization.

4991145166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261648.

The product of its digits is 233280, while the sum is 46.

The square root of 4991145166 is about 70648.0372409595. The cubic root of 4991145166 is about 1708.9659133199.

The spelling of 4991145166 in words is "four billion, nine hundred ninety-one million, one hundred forty-five thousand, one hundred sixty-six".