55448865 has 48 divisors (see below), whose sum is σ = 99672768. Its totient is φ = 28499328.

The previous prime is 55448857. The next prime is 55448867. The reversal of 55448865 is 56884455.

It is not a de Polignac number, because 55448865 - 2³ = 55448857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55448865.

It is not an unprimeable number, because it can be changed into a prime (55448867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159622 + ... + 159968.

It is an arithmetic number, because the mean of its divisors is an integer number (2076516).

Almost surely, 2^55448865 is an apocalyptic number.

It is an amenable number.

55448865 is a deficient number, since it is larger than the sum of its proper divisors (44223903).

55448865 is a wasteful number, since it uses less digits than its factorization.

55448865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 475 counting only the distinct ones).

The product of its digits is 768000, while the sum is 45.

The square root of 55448865 is about 7446.3994655135. The cubic root of 55448865 is about 381.3269972588.

The spelling of 55448865 in words is "fifty-five million, four hundred forty-eight thousand, eight hundred sixty-five".