13316556256643 has 2 divisors, whose sum is σ = 13316556256644. Its totient is φ = 13316556256642.

The previous prime is 13316556256603. The next prime is 13316556256687. The reversal of 13316556256643 is 34665265561331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13316556256643 - 2¹⁴ = 13316556240259 is a prime.

It is not a weakly prime, because it can be changed into another prime (13316556256603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6658278128321 + 6658278128322.

It is an arithmetic number, because the mean of its divisors is an integer number (6658278128322).

Almost surely, 2^{13316556256643} is an apocalyptic number.

13316556256643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13316556256643 is an equidigital number, since it uses as much as digits as its factorization.

13316556256643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992000, while the sum is 56.

The spelling of 13316556256643 in words is "thirteen trillion, three hundred sixteen billion, five hundred fifty-six million, two hundred fifty-six thousand, six hundred forty-three".