4991885081 has 8 divisors (see below), whose sum is σ = 5292182784. Its totient is φ = 4700291760.

The previous prime is 4991885057. The next prime is 4991885137. The reversal of 4991885081 is 1805881994.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4991885081 is a prime.

It is a super-2 number, since 2×4991885081² = 49837833323820753122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4991885021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2174915 + ... + 2177208.

It is an arithmetic number, because the mean of its divisors is an integer number (661522848).

Almost surely, 2^4991885081 is an apocalyptic number.

It is an amenable number.

4991885081 is a deficient number, since it is larger than the sum of its proper divisors (300297703).

4991885081 is a wasteful number, since it uses less digits than its factorization.

4991885081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352191.

The product of its (nonzero) digits is 829440, while the sum is 53.

The square root of 4991885081 is about 70653.2736750393. The cubic root of 4991885081 is about 1709.0503580042.

The spelling of 4991885081 in words is "four billion, nine hundred ninety-one million, eight hundred eighty-five thousand, eighty-one".