6455558555549 has 2 divisors, whose sum is σ = 6455558555550. Its totient is φ = 6455558555548.

The previous prime is 6455558555531. The next prime is 6455558555561. The reversal of 6455558555549 is 9455558555546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5219808396100 + 1235750159449 = 2284690^2 + 1111643^2 .

It is a cyclic number.

It is not a de Polignac number, because 6455558555549 - 2¹⁶ = 6455558490013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6455558555569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227779277774 + 3227779277775.

It is an arithmetic number, because the mean of its divisors is an integer number (3227779277775).

Almost surely, 2^{6455558555549} is an apocalyptic number.

It is an amenable number.

6455558555549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6455558555549 is an equidigital number, since it uses as much as digits as its factorization.

6455558555549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700000000, while the sum is 71.

It can be divided in two parts, 6455558 and 555549, that added together give a palindrome (7011107).

The spelling of 6455558555549 in words is "six trillion, four hundred fifty-five billion, five hundred fifty-eight million, five hundred fifty-five thousand, five hundred forty-nine".