55489809 has 16 divisors (see below), whose sum is σ = 76066560. Its totient is φ = 35967360.

The previous prime is 55489801. The next prime is 55489813. The reversal of 55489809 is 90898455.

It is a happy number.

55489809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55489809 - 2³ = 55489801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55489801) 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 15 ways as a sum of consecutive naturals, for example, 14584 + ... + 17990.

It is an arithmetic number, because the mean of its divisors is an integer number (4754160).

Almost surely, 2^55489809 is an apocalyptic number.

It is an amenable number.

55489809 is a deficient number, since it is larger than the sum of its proper divisors (20576751).

55489809 is a wasteful number, since it uses less digits than its factorization.

55489809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560.

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 55489809 is about 7449.1482063388. The cubic root of 55489809 is about 381.4208327305.

The spelling of 55489809 in words is "fifty-five million, four hundred eighty-nine thousand, eight hundred nine".