5555557877789 has 2 divisors, whose sum is σ = 5555557877790. Its totient is φ = 5555557877788.

The previous prime is 5555557877777. The next prime is 5555557877827. The reversal of 5555557877789 is 9877787555555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5425792224889 + 129765652900 = 2329333^2 + 360230^2 .

It is a cyclic number.

It is not a de Polignac number, because 5555557877789 - 2¹⁶ = 5555557812253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5555557871789) 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, 2777778938894 + 2777778938895.

It is an arithmetic number, because the mean of its divisors is an integer number (2777778938895).

Almost surely, 2^{5555557877789} is an apocalyptic number.

It is an amenable number.

5555557877789 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555557877789 is an equidigital number, since it uses as much as digits as its factorization.

5555557877789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21609000000, while the sum is 83.

It can be divided in two parts, 5555557 and 877789, that added together give a palindrome (6433346).

The spelling of 5555557877789 in words is "five trillion, five hundred fifty-five billion, five hundred fifty-seven million, eight hundred seventy-seven thousand, seven hundred eighty-nine".