55163808 has 144 divisors (see below), whose sum is σ = 187306560. Its totient is φ = 15748992.

The previous prime is 55163807. The next prime is 55163833. The reversal of 55163808 is 80836155.

55163808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (55163807) 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 23 ways as a sum of consecutive naturals, for example, 41685 + ... + 42987.

It is an arithmetic number, because the mean of its divisors is an integer number (1300740).

Almost surely, 2^55163808 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 55163808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93653280).

55163808 is an abundant number, since it is smaller than the sum of its proper divisors (132142752).

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

55163808 is a wasteful number, since it uses less digits than its factorization.

55163808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 55163808 is about 7427.2342093137. The cubic root of 55163808 is about 380.6724197757.

The spelling of 55163808 in words is "fifty-five million, one hundred sixty-three thousand, eight hundred eight".