55009925906 has 32 divisors (see below), whose sum is σ = 89522254080. Its totient is φ = 25201298304.

The previous prime is 55009925891. The next prime is 55009925963. The reversal of 55009925906 is 60952990055.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1930841 + ... + 1959123.

It is an arithmetic number, because the mean of its divisors is an integer number (2797570440).

Almost surely, 2^55009925906 is an apocalyptic number.

55009925906 is a deficient number, since it is larger than the sum of its proper divisors (34512328174).

55009925906 is a wasteful number, since it uses less digits than its factorization.

55009925906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28850.

The product of its (nonzero) digits is 1093500, while the sum is 50.

The spelling of 55009925906 in words is "fifty-five billion, nine million, nine hundred twenty-five thousand, nine hundred six".