55556688 has 80 divisors (see below), whose sum is σ = 160275456. Its totient is φ = 16437120.

The previous prime is 55556687. The next prime is 55556689. The reversal of 55556688 is 88665555.

It is an interprime number because it is at equal distance from previous prime (55556687) and next prime (55556689).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55556687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21481 + ... + 23927.

Almost surely, 2^55556688 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 55556688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80137728).

55556688 is an abundant number, since it is smaller than the sum of its proper divisors (104718768).

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

55556688 is a wasteful number, since it uses less digits than its factorization.

55556688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512 (or 2506 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 48.

The square root of 55556688 is about 7453.6358912949. The cubic root of 55556688 is about 381.5740068174.

The spelling of 55556688 in words is "fifty-five million, five hundred fifty-six thousand, six hundred eighty-eight".