55105664 has 16 divisors (see below), whose sum is σ = 109781070. Its totient is φ = 27552768.

The previous prime is 55105663. The next prime is 55105679. The reversal of 55105664 is 46650155.

It can be written as a sum of positive squares in only one way, i.e., 36096064 + 19009600 = 6008^2 + 4360^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 55105664.

It is not an unprimeable number, because it can be changed into a prime (55105663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215129 + ... + 215384.

Almost surely, 2^55105664 is an apocalyptic number.

It is an amenable number.

55105664 is a deficient number, since it is larger than the sum of its proper divisors (54675406).

55105664 is an equidigital number, since it uses as much as digits as its factorization.

55105664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430527 (or 430515 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 55105664 is about 7423.3189342773. The cubic root of 55105664 is about 380.5386267505.

The spelling of 55105664 in words is "fifty-five million, one hundred five thousand, six hundred sixty-four".