56533649 has 2 divisors, whose sum is σ = 56533650. Its totient is φ = 56533648.

The previous prime is 56533643. The next prime is 56533651. The reversal of 56533649 is 94633565.

56533649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48553024 + 7980625 = 6968^2 + 2825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56533649 is a prime.

Together with 56533651, 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 (56533643) 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, 28266824 + 28266825.

It is an arithmetic number, because the mean of its divisors is an integer number (28266825).

Almost surely, 2^56533649 is an apocalyptic number.

It is an amenable number.

56533649 is a deficient number, since it is larger than the sum of its proper divisors (1).

56533649 is an equidigital number, since it uses as much as digits as its factorization.

56533649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 41.

The square root of 56533649 is about 7518.8861542119. The cubic root of 56533649 is about 383.7976749011.

The spelling of 56533649 in words is "fifty-six million, five hundred thirty-three thousand, six hundred forty-nine".