4891805987 has 8 divisors (see below), whose sum is σ = 5150038800. Its totient is φ = 4633650144.

The previous prime is 4891805977. The next prime is 4891806041. The reversal of 4891805987 is 7895081984.

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

It is a cyclic number.

It is not a de Polignac number, because 4891805987 - 2⁶ = 4891805923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4891805957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149033 + ... + 178869.

It is an arithmetic number, because the mean of its divisors is an integer number (643754850).

Almost surely, 2^4891805987 is an apocalyptic number.

4891805987 is a deficient number, since it is larger than the sum of its proper divisors (258232813).

4891805987 is a wasteful number, since it uses less digits than its factorization.

4891805987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38485.

The product of its (nonzero) digits is 5806080, while the sum is 59.

The square root of 4891805987 is about 69941.4468466302. The cubic root of 4891805987 is about 1697.5519536012.

The spelling of 4891805987 in words is "four billion, eight hundred ninety-one million, eight hundred five thousand, nine hundred eighty-seven".