55445808 has 80 divisors (see below), whose sum is σ = 157418496. Its totient is φ = 16677120.

The previous prime is 55445807. The next prime is 55445809. The reversal of 55445808 is 80854455.

It is an interprime number because it is at equal distance from previous prime (55445807) and next prime (55445809).

It is not an unprimeable number, because it can be changed into a prime (55445807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91041 + ... + 91647.

Almost surely, 2^55445808 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 55445808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78709248).

55445808 is an abundant number, since it is smaller than the sum of its proper divisors (101972688).

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

55445808 is a wasteful number, since it uses less digits than its factorization.

55445808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 39.

The square root of 55445808 is about 7446.1941956949. The cubic root of 55445808 is about 381.3199893723.

The spelling of 55445808 in words is "fifty-five million, four hundred forty-five thousand, eight hundred eight".