55644559 has 8 divisors (see below), whose sum is σ = 60157040. Its totient is φ = 51290496.

The previous prime is 55644551. The next prime is 55644583. The reversal of 55644559 is 95544655.

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

It is a cyclic number.

It is not a de Polignac number, because 55644559 - 2³ = 55644551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55644551) 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, 38874 + ... + 40279.

It is an arithmetic number, because the mean of its divisors is an integer number (7519630).

Almost surely, 2^55644559 is an apocalyptic number.

55644559 is a deficient number, since it is larger than the sum of its proper divisors (4512481).

55644559 is a wasteful number, since it uses less digits than its factorization.

55644559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79209.

The product of its digits is 540000, while the sum is 43.

The square root of 55644559 is about 7459.5280681823. The cubic root of 55644559 is about 381.7750724864.

The spelling of 55644559 in words is "fifty-five million, six hundred forty-four thousand, five hundred fifty-nine".