55644558 has 8 divisors (see below), whose sum is σ = 111289128. Its totient is φ = 18548184.

The previous prime is 55644551. The next prime is 55644583. The reversal of 55644558 is 85544655.

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

55644558 is an admirable number.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4637041 + ... + 4637052.

It is an arithmetic number, because the mean of its divisors is an integer number (13911141).

Almost surely, 2^55644558 is an apocalyptic number.

55644558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55644558 is a wasteful number, since it uses less digits than its factorization.

55644558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9274098.

The product of its digits is 480000, while the sum is 42.

The square root of 55644558 is about 7459.5280011540. The cubic root of 55644558 is about 381.7750701994.

The spelling of 55644558 in words is "fifty-five million, six hundred forty-four thousand, five hundred fifty-eight".