55444418 has 8 divisors (see below), whose sum is σ = 83231820. Its totient is φ = 27700480.

The previous prime is 55444387. The next prime is 55444427. The reversal of 55444418 is 81444455.

It can be written as a sum of positive squares in 2 ways, for example, as 55160329 + 284089 = 7427^2 + 533^2 .

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

It is an unprimeable number.

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, 7463 + ... + 12906.

Almost surely, 2^55444418 is an apocalyptic number.

55444418 is a deficient number, since it is larger than the sum of its proper divisors (27787402).

55444418 is a wasteful number, since it uses less digits than its factorization.

55444418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21732.

The product of its digits is 51200, while the sum is 35.

The square root of 55444418 is about 7446.1008588388. The cubic root of 55444418 is about 381.3168028421.

The spelling of 55444418 in words is "fifty-five million, four hundred forty-four thousand, four hundred eighteen".