16555457557 has 2 divisors, whose sum is σ = 16555457558. Its totient is φ = 16555457556.

The previous prime is 16555457533. The next prime is 16555457573. The reversal of 16555457557 is 75575455561.

It is a happy number.

16555457557 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 can be written as a sum of positive squares in only one way, i.e., 16545934161 + 9523396 = 128631^2 + 3086^2 .

It is a cyclic number.

It is not a de Polignac number, because 16555457557 - 2¹¹ = 16555455509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16555457498 and 16555457507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16555457657) 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, 8277728778 + 8277728779.

It is an arithmetic number, because the mean of its divisors is an integer number (8277728779).

Almost surely, 2^16555457557 is an apocalyptic number.

It is an amenable number.

16555457557 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555457557 is an equidigital number, since it uses as much as digits as its factorization.

16555457557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18375000, while the sum is 55.

The spelling of 16555457557 in words is "sixteen billion, five hundred fifty-five million, four hundred fifty-seven thousand, five hundred fifty-seven".