5478638889 has 4 divisors (see below), whose sum is σ = 7304851856. Its totient is φ = 3652425924.

The previous prime is 5478638839. The next prime is 5478638929. The reversal of 5478638889 is 9888368745.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5478638889 - 2¹⁹ = 5478114601 is a prime.

It is a super-3 number, since 3×5478638889³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5478638819) 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, 913106479 + ... + 913106484.

It is an arithmetic number, because the mean of its divisors is an integer number (1826212964).

Almost surely, 2^5478638889 is an apocalyptic number.

It is an amenable number.

5478638889 is a deficient number, since it is larger than the sum of its proper divisors (1826212967).

5478638889 is a wasteful number, since it uses less digits than its factorization.

5478638889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826212966.

The product of its digits is 92897280, while the sum is 66.

The square root of 5478638889 is about 74017.8281834856. The cubic root of 5478638889 is about 1762.8859857415.

The spelling of 5478638889 in words is "five billion, four hundred seventy-eight million, six hundred thirty-eight thousand, eight hundred eighty-nine".