55717688 has 64 divisors (see below), whose sum is σ = 117482400. Its totient is φ = 24606720.

The previous prime is 55717679. The next prime is 55717769. The reversal of 55717688 is 88671755.

It is a happy number.

55717688 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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 311183 + ... + 311361.

Almost surely, 2^55717688 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 55717688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58741200).

55717688 is an abundant number, since it is smaller than the sum of its proper divisors (61764712).

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

55717688 is a wasteful number, since it uses less digits than its factorization.

55717688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 308 counting only the distinct ones).

The product of its digits is 470400, while the sum is 47.

The square root of 55717688 is about 7464.4281763575. The cubic root of 55717688 is about 381.9422443132.

The spelling of 55717688 in words is "fifty-five million, seven hundred seventeen thousand, six hundred eighty-eight".