16555681579 has 2 divisors, whose sum is σ = 16555681580. Its totient is φ = 16555681578.

The previous prime is 16555681517. The next prime is 16555681609. The reversal of 16555681579 is 97518655561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16555681579 - 2¹¹ = 16555679531 is a prime.

It is not a weakly prime, because it can be changed into another prime (16555681279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277840789 + 8277840790.

It is an arithmetic number, because the mean of its divisors is an integer number (8277840790).

Almost surely, 2^16555681579 is an apocalyptic number.

16555681579 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555681579 is an equidigital number, since it uses as much as digits as its factorization.

16555681579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340000, while the sum is 58.

The spelling of 16555681579 in words is "sixteen billion, five hundred fifty-five million, six hundred eighty-one thousand, five hundred seventy-nine".