55645806 has 16 divisors (see below), whose sum is σ = 114882048. Its totient is φ = 17950200.

The previous prime is 55645801. The next prime is 55645823. The reversal of 55645806 is 60854655.

55645806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55645801) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 149400 + ... + 149771.

It is an arithmetic number, because the mean of its divisors is an integer number (7180128).

Almost surely, 2^55645806 is an apocalyptic number.

55645806 is an abundant number, since it is smaller than the sum of its proper divisors (59236242).

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

55645806 is a wasteful number, since it uses less digits than its factorization.

55645806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299207.

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 55645806 is about 7459.6116520902. The cubic root of 55645806 is about 381.7779243373. Note that the first 3 decimals are identical.

The spelling of 55645806 in words is "fifty-five million, six hundred forty-five thousand, eight hundred six".