55511868 has 48 divisors (see below), whose sum is σ = 140513184. Its totient is φ = 16988160.

The previous prime is 55511867. The next prime is 55511873. The reversal of 55511868 is 86811555.

55511868 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

55511868 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55511867) 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, 5046 + ... + 11682.

It is an arithmetic number, because the mean of its divisors is an integer number (2927358).

Almost surely, 2^55511868 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 55511868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70256592).

55511868 is an abundant number, since it is smaller than the sum of its proper divisors (85001316).

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

55511868 is a wasteful number, since it uses less digits than its factorization.

55511868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6702 (or 6700 counting only the distinct ones).

The product of its digits is 48000, while the sum is 39.

The square root of 55511868 is about 7450.6286983046. The cubic root of 55511868 is about 381.4713684212.

The spelling of 55511868 in words is "fifty-five million, five hundred eleven thousand, eight hundred sixty-eight".