55563968 has 28 divisors (see below), whose sum is σ = 111343440. Its totient is φ = 27508992.

The previous prime is 55563947. The next prime is 55563983. The reversal of 55563968 is 86936555.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2378 + ... + 10806.

Almost surely, 2^55563968 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 55563968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55671720).

55563968 is an abundant number, since it is smaller than the sum of its proper divisors (55779472).

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

55563968 is a wasteful number, since it uses less digits than its factorization.

55563968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8544 (or 8534 counting only the distinct ones).

The product of its digits is 972000, while the sum is 47.

The square root of 55563968 is about 7454.1242275669. The cubic root of 55563968 is about 381.5906729023.

The spelling of 55563968 in words is "fifty-five million, five hundred sixty-three thousand, nine hundred sixty-eight".