55568916 has 120 divisors (see below), whose sum is σ = 159371520. Its totient is φ = 16780608.

The previous prime is 55568893. The next prime is 55568917. The reversal of 55568916 is 61986555.

It is a happy number.

55568916 is a `hidden beast` number, since 5 + 556 + 8 + 91 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55568917) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 332665 + ... + 332831.

It is an arithmetic number, because the mean of its divisors is an integer number (1328096).

Almost surely, 2^55568916 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 55568916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79685760).

55568916 is an abundant number, since it is smaller than the sum of its proper divisors (103802604).

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

55568916 is a wasteful number, since it uses less digits than its factorization.

55568916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 264 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 55568916 is about 7454.4561169813. The cubic root of 55568916 is about 381.6019995149.

The spelling of 55568916 in words is "fifty-five million, five hundred sixty-eight thousand, nine hundred sixteen".