55943727869 has 2 divisors, whose sum is σ = 55943727870. Its totient is φ = 55943727868.

The previous prime is 55943727841. The next prime is 55943727893. The reversal of 55943727869 is 96872734955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54878684644 + 1065043225 = 234262^2 + 32635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55943727869 is a prime.

It is a super-2 number, since 2×55943727869² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55943727269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27971863934 + 27971863935.

It is an arithmetic number, because the mean of its divisors is an integer number (27971863935).

Almost surely, 2^55943727869 is an apocalyptic number.

It is an amenable number.

55943727869 is a deficient number, since it is larger than the sum of its proper divisors (1).

55943727869 is an equidigital number, since it uses as much as digits as its factorization.

55943727869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114307200, while the sum is 65.

The spelling of 55943727869 in words is "fifty-five billion, nine hundred forty-three million, seven hundred twenty-seven thousand, eight hundred sixty-nine".