4911805987 has 4 divisors (see below), whose sum is σ = 5358333816. Its totient is φ = 4465278160.

The previous prime is 4911805939. The next prime is 4911805993. The reversal of 4911805987 is 7895081194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4911805987 - 2¹⁵ = 4911773219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4911800987) 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 3 ways as a sum of consecutive naturals, for example, 223263898 + ... + 223263919.

It is an arithmetic number, because the mean of its divisors is an integer number (1339583454).

Almost surely, 2^4911805987 is an apocalyptic number.

4911805987 is a deficient number, since it is larger than the sum of its proper divisors (446527829).

4911805987 is a wasteful number, since it uses less digits than its factorization.

4911805987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446527828.

The product of its (nonzero) digits is 725760, while the sum is 52.

The square root of 4911805987 is about 70084.2777447267. The cubic root of 4911805987 is about 1699.8622710795.

The spelling of 4911805987 in words is "four billion, nine hundred eleven million, eight hundred five thousand, nine hundred eighty-seven".