55605560 has 64 divisors (see below), whose sum is σ = 128671200. Its totient is φ = 21620736.

The previous prime is 55605527. The next prime is 55605577. The reversal of 55605560 is 6550655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399971 + ... + 400109.

Almost surely, 2^55605560 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 55605560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64335600).

55605560 is an abundant number, since it is smaller than the sum of its proper divisors (73065640).

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

55605560 is a wasteful number, since it uses less digits than its factorization.

55605560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 55605560 is about 7456.9135706403. The cubic root of 55605560 is about 381.6858614536.

It can be divided in two parts, 55605 and 560, that added together give a palindrome (56165).

The spelling of 55605560 in words is "fifty-five million, six hundred five thousand, five hundred sixty".