55681368 has 32 divisors (see below), whose sum is σ = 141566400. Its totient is φ = 18245408.

The previous prime is 55681361. The next prime is 55681369. The reversal of 55681368 is 86318655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55681361) by changing a digit.

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, 18246 + ... + 21077.

It is an arithmetic number, because the mean of its divisors is an integer number (4423950).

Almost surely, 2^55681368 is an apocalyptic number.

It is an amenable number.

55681368 is an abundant number, since it is smaller than the sum of its proper divisors (85885032).

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

55681368 is a wasteful number, since it uses less digits than its factorization.

55681368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39391 (or 39387 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 55681368 is about 7461.9949075298. The cubic root of 55681368 is about 381.8592356186.

The spelling of 55681368 in words is "fifty-five million, six hundred eighty-one thousand, three hundred sixty-eight".