55185644448 has 288 divisors, whose sum is σ = 180132144192. Its totient is φ = 15872716800.

The previous prime is 55185644447. The next prime is 55185644539. The reversal of 55185644448 is 84444658155.

55185644448 is a `hidden beast` number, since 551 + 8 + 5 + 6 + 4 + 44 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a junction number, because it is equal to n+sod(n) for n = 55185644394 and 55185644403.

It is not an unprimeable number, because it can be changed into a prime (55185644447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4800115 + ... + 4811597.

It is an arithmetic number, because the mean of its divisors is an integer number (625458834).

Almost surely, 2^55185644448 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 55185644448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90066072096).

55185644448 is an abundant number, since it is smaller than the sum of its proper divisors (124946499744).

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

55185644448 is a wasteful number, since it uses less digits than its factorization.

55185644448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11588 (or 11577 counting only the distinct ones).

The product of its digits is 12288000, while the sum is 54.

The spelling of 55185644448 in words is "fifty-five billion, one hundred eighty-five million, six hundred forty-four thousand, four hundred forty-eight".