55980811 has 2 divisors, whose sum is σ = 55980812. Its totient is φ = 55980810.

The previous prime is 55980787. The next prime is 55980829. The reversal of 55980811 is 11808955.

55980811 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 is a cyclic number.

It is not a de Polignac number, because 55980811 - 2¹¹ = 55978763 is a prime.

It is not a weakly prime, because it can be changed into another prime (55920811) 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, 27990405 + 27990406.

It is an arithmetic number, because the mean of its divisors is an integer number (27990406).

Almost surely, 2^55980811 is an apocalyptic number.

55980811 is a deficient number, since it is larger than the sum of its proper divisors (1).

55980811 is an equidigital number, since it uses as much as digits as its factorization.

55980811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 55980811 is about 7482.0325447033. The cubic root of 55980811 is about 382.5425324712.

The spelling of 55980811 in words is "fifty-five million, nine hundred eighty thousand, eight hundred eleven".