55518560 has 48 divisors (see below), whose sum is σ = 133657776. Its totient is φ = 21785088.

The previous prime is 55518559. The next prime is 55518563. The reversal of 55518560 is 6581555.

It is a self number, because there is not a number n which added to its sum of digits gives 55518560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55518563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5207 + ... + 11753.

It is an arithmetic number, because the mean of its divisors is an integer number (2784537).

Almost surely, 2^55518560 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 55518560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66828888).

55518560 is an abundant number, since it is smaller than the sum of its proper divisors (78139216).

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

55518560 is a wasteful number, since it uses less digits than its factorization.

55518560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615 (or 6607 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 55518560 is about 7451.0777743894. The cubic root of 55518560 is about 381.4866966979.

The spelling of 55518560 in words is "fifty-five million, five hundred eighteen thousand, five hundred sixty".