55816816 has 40 divisors (see below), whose sum is σ = 118996848. Its totient is φ = 25361600.

The previous prime is 55816811. The next prime is 55816819. The reversal of 55816816 is 61861855.

55816816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55816811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19986 + ... + 22606.

Almost surely, 2^55816816 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 55816816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59498424).

55816816 is an abundant number, since it is smaller than the sum of its proper divisors (63180032).

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

55816816 is a wasteful number, since it uses less digits than its factorization.

55816816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662 (or 2634 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The square root of 55816816 is about 7471.0652520240. The cubic root of 55816816 is about 382.1686161126.

The spelling of 55816816 in words is "fifty-five million, eight hundred sixteen thousand, eight hundred sixteen".