56640011 has 2 divisors, whose sum is σ = 56640012. Its totient is φ = 56640010.

The previous prime is 56639981. The next prime is 56640013. The reversal of 56640011 is 11004665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56640011 - 2¹⁰ = 56638987 is a prime.

Together with 56640013, 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 (56640013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28320005 + 28320006.

It is an arithmetic number, because the mean of its divisors is an integer number (28320006).

Almost surely, 2^56640011 is an apocalyptic number.

56640011 is a deficient number, since it is larger than the sum of its proper divisors (1).

56640011 is an equidigital number, since it uses as much as digits as its factorization.

56640011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 56640011 is about 7525.9558196949. The cubic root of 56640011 is about 384.0382155073.

Adding to 56640011 its reverse (11004665), we get a palindrome (67644676).

The spelling of 56640011 in words is "fifty-six million, six hundred forty thousand, eleven".