55909556 has 12 divisors (see below), whose sum is σ = 98007168. Its totient is φ = 27907512.

The previous prime is 55909543. The next prime is 55909559. The reversal of 55909556 is 65590955.

55909556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55909559) 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 3 ways as a sum of consecutive naturals, for example, 9086 + ... + 13941.

It is an arithmetic number, because the mean of its divisors is an integer number (8167264).

Almost surely, 2^55909556 is an apocalyptic number.

It is an amenable number.

55909556 is a deficient number, since it is larger than the sum of its proper divisors (42097612).

55909556 is a wasteful number, since it uses less digits than its factorization.

55909556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23638 (or 23636 counting only the distinct ones).

The product of its (nonzero) digits is 303750, while the sum is 44.

The square root of 55909556 is about 7477.2692876477. The cubic root of 55909556 is about 382.3801575373.

It can be divided in two parts, 55909 and 556, that added together give a palindrome (56465).

The spelling of 55909556 in words is "fifty-five million, nine hundred nine thousand, five hundred fifty-six".