55616144 has 20 divisors (see below), whose sum is σ = 108326400. Its totient is φ = 27660960.

The previous prime is 55616137. The next prime is 55616147. The reversal of 55616144 is 44161655.

It is a self number, because there is not a number n which added to its sum of digits gives 55616144.

It is not an unprimeable number, because it can be changed into a prime (55616147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6044 + ... + 12155.

It is an arithmetic number, because the mean of its divisors is an integer number (5416320).

Almost surely, 2^55616144 is an apocalyptic number.

It is an amenable number.

55616144 is a deficient number, since it is larger than the sum of its proper divisors (52710256).

55616144 is a wasteful number, since it uses less digits than its factorization.

55616144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18398 (or 18392 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 55616144 is about 7457.6232138665. The cubic root of 55616144 is about 381.7100766992.

Adding to 55616144 its reverse (44161655), we get a palindrome (99777799).

The spelling of 55616144 in words is "fifty-five million, six hundred sixteen thousand, one hundred forty-four".