55543609 has 8 divisors (see below), whose sum is σ = 60689952. Its totient is φ = 50413440.

The previous prime is 55543601. The next prime is 55543627. The reversal of 55543609 is 90634555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55543609 - 2³ = 55543601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55543601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3817 + ... + 11209.

It is an arithmetic number, because the mean of its divisors is an integer number (7586244).

Almost surely, 2^55543609 is an apocalyptic number.

It is an amenable number.

55543609 is a deficient number, since it is larger than the sum of its proper divisors (5146343).

55543609 is a wasteful number, since it uses less digits than its factorization.

55543609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8087.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 55543609 is about 7452.7584826023. The cubic root of 55543609 is about 381.5440614391.

The spelling of 55543609 in words is "fifty-five million, five hundred forty-three thousand, six hundred nine".