55568864 has 72 divisors (see below), whose sum is σ = 122615640. Its totient is φ = 24641280.

The previous prime is 55568861. The next prime is 55568879. The reversal of 55568864 is 46886555.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55568861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399707 + ... + 399845.

It is an arithmetic number, because the mean of its divisors is an integer number (1702995).

Almost surely, 2^55568864 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 55568864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61307820).

55568864 is an abundant number, since it is smaller than the sum of its proper divisors (67046776).

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

55568864 is a wasteful number, since it uses less digits than its factorization.

55568864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 185 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 47.

The square root of 55568864 is about 7454.4526291338. The cubic root of 55568864 is about 381.6018804836.

The spelling of 55568864 in words is "fifty-five million, five hundred sixty-eight thousand, eight hundred sixty-four".