55504809 has 12 divisors (see below), whose sum is σ = 80884596. Its totient is φ = 36675072.

The previous prime is 55504807. The next prime is 55504829. The reversal of 55504809 is 90840555.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10989225 + 44515584 = 3315^2 + 6672^2 .

It is not a de Polignac number, because 55504809 - 2¹ = 55504807 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55504807) 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, 26272 + ... + 28305.

It is an arithmetic number, because the mean of its divisors is an integer number (6740383).

Almost surely, 2^55504809 is an apocalyptic number.

It is an amenable number.

55504809 is a deficient number, since it is larger than the sum of its proper divisors (25379787).

55504809 is a wasteful number, since it uses less digits than its factorization.

55504809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54696 (or 54693 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 55504809 is about 7450.1549648313. The cubic root of 55504809 is about 381.4551981821.

The spelling of 55504809 in words is "fifty-five million, five hundred four thousand, eight hundred nine".