55646443 has 2 divisors, whose sum is σ = 55646444. Its totient is φ = 55646442.

The previous prime is 55646441. The next prime is 55646467. The reversal of 55646443 is 34464655.

55646443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55646443 - 2¹ = 55646441 is a prime.

Together with 55646441, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55646441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27823221 + 27823222.

It is an arithmetic number, because the mean of its divisors is an integer number (27823222).

Almost surely, 2^55646443 is an apocalyptic number.

55646443 is a deficient number, since it is larger than the sum of its proper divisors (1).

55646443 is an equidigital number, since it uses as much as digits as its factorization.

55646443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 37.

The square root of 55646443 is about 7459.6543485607. The cubic root of 55646443 is about 381.7793811204.

The spelling of 55646443 in words is "fifty-five million, six hundred forty-six thousand, four hundred forty-three".