55439616 has 72 divisors (see below), whose sum is σ = 151615744. Its totient is φ = 17971200.

The previous prime is 55439603. The next prime is 55439623. The reversal of 55439616 is 61693455.

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 7 ways as a sum of consecutive naturals, for example, 27441 + ... + 29391.

Almost surely, 2^55439616 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 55439616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75807872).

55439616 is an abundant number, since it is smaller than the sum of its proper divisors (96176128).

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

55439616 is a wasteful number, since it uses less digits than its factorization.

55439616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007 (or 1993 counting only the distinct ones).

The product of its digits is 97200, while the sum is 39.

The square root of 55439616 is about 7445.7784012150. The cubic root of 55439616 is about 381.3057940023.

The spelling of 55439616 in words is "fifty-five million, four hundred thirty-nine thousand, six hundred sixteen".