55545040 has 20 divisors (see below), whose sum is σ = 129142404. Its totient is φ = 22217984.

The previous prime is 55545031. The next prime is 55545067. The reversal of 55545040 is 4054555.

55545040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 33039504 + 22505536 = 5748^2 + 4744^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347077 + ... + 347236.

Almost surely, 2^55545040 is an apocalyptic number.

It is an amenable number.

55545040 is an abundant number, since it is smaller than the sum of its proper divisors (73597364).

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

55545040 is a wasteful number, since it uses less digits than its factorization.

55545040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694326 (or 694320 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 55545040 is about 7452.8544867051. The cubic root of 55545040 is about 381.5473380529.

Adding to 55545040 its reverse (4054555), we get a palindrome (59599595).

The spelling of 55545040 in words is "fifty-five million, five hundred forty-five thousand, forty".