55565616 has 40 divisors (see below), whose sum is σ = 144951040. Its totient is φ = 18340416.

The previous prime is 55565611. The next prime is 55565617. The reversal of 55565616 is 61656555.

It is not an unprimeable number, because it can be changed into a prime (55565611) 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, 676 + ... + 10563.

It is an arithmetic number, because the mean of its divisors is an integer number (3623776).

Almost surely, 2^55565616 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 55565616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72475520).

55565616 is an abundant number, since it is smaller than the sum of its proper divisors (89385424).

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

55565616 is a wasteful number, since it uses less digits than its factorization.

55565616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11353 (or 11347 counting only the distinct ones).

The product of its digits is 135000, while the sum is 39.

The square root of 55565616 is about 7454.2347695790. The cubic root of 55565616 is about 381.5944454624.

The spelling of 55565616 in words is "fifty-five million, five hundred sixty-five thousand, six hundred sixteen".