55645361 has 2 divisors, whose sum is σ = 55645362. Its totient is φ = 55645360.

The previous prime is 55645351. The next prime is 55645363. The reversal of 55645361 is 16354655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52200625 + 3444736 = 7225^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 55645361 - 2⁶ = 55645297 is a prime.

Together with 55645363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55645363) 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, 27822680 + 27822681.

It is an arithmetic number, because the mean of its divisors is an integer number (27822681).

Almost surely, 2^55645361 is an apocalyptic number.

It is an amenable number.

55645361 is a deficient number, since it is larger than the sum of its proper divisors (1).

55645361 is an equidigital number, since it uses as much as digits as its factorization.

55645361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 35.

The square root of 55645361 is about 7459.5818247406. The cubic root of 55645361 is about 381.7769066408.

The spelling of 55645361 in words is "fifty-five million, six hundred forty-five thousand, three hundred sixty-one".