55563331729 has 2 divisors, whose sum is σ = 55563331730. Its totient is φ = 55563331728.

The previous prime is 55563331721. The next prime is 55563331757. The reversal of 55563331729 is 92713336555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34899844225 + 20663487504 = 186815^2 + 143748^2 .

It is a cyclic number.

It is not a de Polignac number, because 55563331729 - 2³ = 55563331721 is a prime.

It is not a weakly prime, because it can be changed into another prime (55563331721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27781665864 + 27781665865.

It is an arithmetic number, because the mean of its divisors is an integer number (27781665865).

Almost surely, 2^55563331729 is an apocalyptic number.

It is an amenable number.

55563331729 is a deficient number, since it is larger than the sum of its proper divisors (1).

55563331729 is an equidigital number, since it uses as much as digits as its factorization.

55563331729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2551500, while the sum is 49.

The spelling of 55563331729 in words is "fifty-five billion, five hundred sixty-three million, three hundred thirty-one thousand, seven hundred twenty-nine".