55556736 has 64 divisors (see below), whose sum is σ = 148716000. Its totient is φ = 18375680.

The previous prime is 55556717. The next prime is 55556747. The reversal of 55556736 is 63765555.

It is a happy number.

55556736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

Its product of digits (472500) is a multiple of the sum of its prime divisors (1125).

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 7 ways as a sum of consecutive naturals, for example, 56731 + ... + 57701.

Almost surely, 2^55556736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55556736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74358000).

55556736 is an abundant number, since it is smaller than the sum of its proper divisors (93159264).

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

55556736 is a wasteful number, since it uses less digits than its factorization.

55556736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1125 counting only the distinct ones).

The product of its digits is 472500, while the sum is 42.

The square root of 55556736 is about 7453.6391111993. The cubic root of 55556736 is about 381.5741167084.

It can be divided in two parts, 555 and 56736, that added together give a triangular number (57291 = T₃₃₈).

The spelling of 55556736 in words is "fifty-five million, five hundred fifty-six thousand, seven hundred thirty-six".