4779949891 has 12 divisors (see below), whose sum is σ = 5080162320. Its totient is φ = 4496562560.

The previous prime is 4779949883. The next prime is 4779949981. The reversal of 4779949891 is 1989499774.

It is not a de Polignac number, because 4779949891 - 2³ = 4779949883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4779943891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1128165 + ... + 1132393.

It is an arithmetic number, because the mean of its divisors is an integer number (423346860).

Almost surely, 2^4779949891 is an apocalyptic number.

4779949891 is a deficient number, since it is larger than the sum of its proper divisors (300212429).

4779949891 is a wasteful number, since it uses less digits than its factorization.

4779949891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8174 (or 8157 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 67.

The square root of 4779949891 is about 69137.1816825071. The cubic root of 4779949891 is about 1684.5133142287.

The spelling of 4779949891 in words is "four billion, seven hundred seventy-nine million, nine hundred forty-nine thousand, eight hundred ninety-one".