55981368 has 112 divisors (see below), whose sum is σ = 163294200. Its totient is φ = 17962560.

The previous prime is 55981363. The next prime is 55981421. The reversal of 55981368 is 86318955.

55981368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (259200) is a multiple of the sum of its prime factors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55981361) 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 27 ways as a sum of consecutive naturals, for example, 168963 + ... + 169293.

Almost surely, 2^55981368 is an apocalyptic number.

55981368 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55981368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81647100).

55981368 is an abundant number, since it is smaller than the sum of its proper divisors (107312832).

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

55981368 is a wasteful number, since it uses less digits than its factorization.

55981368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 365 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 55981368 is about 7482.0697671166. The cubic root of 55981368 is about 382.5438012124.

The spelling of 55981368 in words is "fifty-five million, nine hundred eighty-one thousand, three hundred sixty-eight".