55644517 has 2 divisors, whose sum is σ = 55644518. Its totient is φ = 55644516.

The previous prime is 55644499. The next prime is 55644527. The reversal of 55644517 is 71544655.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55442916 + 201601 = 7446^2 + 449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55644517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55644527) by changing a digit.

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 as a sum of consecutive naturals, namely, 27822258 + 27822259.

It is an arithmetic number, because the mean of its divisors is an integer number (27822259).

Almost surely, 2^55644517 is an apocalyptic number.

It is an amenable number.

55644517 is a deficient number, since it is larger than the sum of its proper divisors (1).

55644517 is an equidigital number, since it uses as much as digits as its factorization.

55644517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 37.

The square root of 55644517 is about 7459.5252529903. The cubic root of 55644517 is about 381.7749764329.

The spelling of 55644517 in words is "fifty-five million, six hundred forty-four thousand, five hundred seventeen".