16377556417 has 2 divisors, whose sum is σ = 16377556418. Its totient is φ = 16377556416.

The previous prime is 16377556379. The next prime is 16377556423. The reversal of 16377556417 is 71465577361.

16377556417 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., 11244693681 + 5132862736 = 106041^2 + 71644^2 .

It is an emirp because it is prime and its reverse (71465577361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16377556417 - 2⁷ = 16377556289 is a prime.

It is not a weakly prime, because it can be changed into another prime (16377556487) 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, 8188778208 + 8188778209.

It is an arithmetic number, because the mean of its divisors is an integer number (8188778209).

Almost surely, 2^16377556417 is an apocalyptic number.

It is an amenable number.

16377556417 is a deficient number, since it is larger than the sum of its proper divisors (1).

16377556417 is an equidigital number, since it uses as much as digits as its factorization.

16377556417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3704400, while the sum is 52.

The spelling of 16377556417 in words is "sixteen billion, three hundred seventy-seven million, five hundred fifty-six thousand, four hundred seventeen".