55558944 has 216 divisors, whose sum is σ = 191213568. Its totient is φ = 15240960.

The previous prime is 55558927. The next prime is 55558957. The reversal of 55558944 is 44985555.

55558944 is a `hidden beast` number, since 5 + 5 + 558 + 94 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 55558944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 437409 + ... + 437535.

It is an arithmetic number, because the mean of its divisors is an integer number (885248).

Almost surely, 2^55558944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55558944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95606784).

55558944 is an abundant number, since it is smaller than the sum of its proper divisors (135654624).

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

55558944 is a wasteful number, since it uses less digits than its factorization.

55558944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 170 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The square root of 55558944 is about 7453.7872252969. The cubic root of 55558944 is about 381.5791716280.

The spelling of 55558944 in words is "fifty-five million, five hundred fifty-eight thousand, nine hundred forty-four".