55556118 has 48 divisors (see below), whose sum is σ = 126497280. Its totient is φ = 18271656.

The previous prime is 55556113. The next prime is 55556143. The reversal of 55556118 is 81165555.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55556113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37671 + ... + 39117.

It is an arithmetic number, because the mean of its divisors is an integer number (2635360).

Almost surely, 2^55556118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55556118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63248640).

55556118 is an abundant number, since it is smaller than the sum of its proper divisors (70941162).

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

55556118 is a wasteful number, since it uses less digits than its factorization.

55556118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543 (or 1531 counting only the distinct ones).

The product of its digits is 30000, while the sum is 36.

The square root of 55556118 is about 7453.5976548241. The cubic root of 55556118 is about 381.5727018564.

The spelling of 55556118 in words is "fifty-five million, five hundred fifty-six thousand, one hundred eighteen".