4891128479 has 4 divisors (see below), whose sum is σ = 4983413976. Its totient is φ = 4798842984.

The previous prime is 4891128433. The next prime is 4891128491. The reversal of 4891128479 is 9748211984.

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 4891128479 - 2²⁴ = 4874351263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 92285443 = 4891128479 / (4 + 8 + 9 + 1 + 1 + 2 + 8 + 4 + 7 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4891128479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891128419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46142669 + ... + 46142774.

It is an arithmetic number, because the mean of its divisors is an integer number (1245853494).

Almost surely, 2^4891128479 is an apocalyptic number.

4891128479 is a deficient number, since it is larger than the sum of its proper divisors (92285497).

4891128479 is an equidigital number, since it uses as much as digits as its factorization.

4891128479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92285496.

The product of its digits is 1161216, while the sum is 53.

The square root of 4891128479 is about 69936.6032846892. The cubic root of 4891128479 is about 1697.4735804923.

The spelling of 4891128479 in words is "four billion, eight hundred ninety-one million, one hundred twenty-eight thousand, four hundred seventy-nine".