4778988289 has 4 divisors (see below), whose sum is σ = 4844453956. Its totient is φ = 4713522624.

The previous prime is 4778988257. The next prime is 4778988293. The reversal of 4778988289 is 9828898774.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1263447025 + 3515541264 = 35545^2 + 59292^2 .

It is a cyclic number.

It is not a de Polignac number, because 4778988289 - 2⁵ = 4778988257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4778988239) 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, 32732724 + ... + 32732869.

It is an arithmetic number, because the mean of its divisors is an integer number (1211113489).

Almost surely, 2^4778988289 is an apocalyptic number.

It is an amenable number.

4778988289 is a deficient number, since it is larger than the sum of its proper divisors (65465667).

4778988289 is an equidigital number, since it uses as much as digits as its factorization.

4778988289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65465666.

The product of its digits is 130056192, while the sum is 70.

The square root of 4778988289 is about 69130.2270284136. The cubic root of 4778988289 is about 1684.4003465167.

The spelling of 4778988289 in words is "four billion, seven hundred seventy-eight million, nine hundred eighty-eight thousand, two hundred eighty-nine".