55644656 has 20 divisors (see below), whose sum is σ = 108419400. Its totient is φ = 27665472.

The previous prime is 55644643. The next prime is 55644683. The reversal of 55644656 is 65644655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6851 + ... + 12578.

It is an arithmetic number, because the mean of its divisors is an integer number (5420970).

Almost surely, 2^55644656 is an apocalyptic number.

It is an amenable number.

55644656 is a deficient number, since it is larger than the sum of its proper divisors (52774744).

55644656 is a wasteful number, since it uses less digits than its factorization.

55644656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19616 (or 19610 counting only the distinct ones).

The product of its digits is 432000, while the sum is 41.

The square root of 55644656 is about 7459.5345699313. The cubic root of 55644656 is about 381.7752943239.

Subtracting 55644656 from its reverse (65644655), we obtain a palindrome (9999999).

The spelling of 55644656 in words is "fifty-five million, six hundred forty-four thousand, six hundred fifty-six".