13316556256687 has 2 divisors, whose sum is σ = 13316556256688. Its totient is φ = 13316556256686.

The previous prime is 13316556256643. The next prime is 13316556256781. The reversal of 13316556256687 is 78665265561331.

It is a happy number.

13316556256687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13316556256687 - 2³⁵ = 13282196518319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13316556256187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6658278128343 + 6658278128344.

It is an arithmetic number, because the mean of its divisors is an integer number (6658278128344).

Almost surely, 2^{13316556256687} is an apocalyptic number.

13316556256687 is a deficient number, since it is larger than the sum of its proper divisors (1).

13316556256687 is an equidigital number, since it uses as much as digits as its factorization.

13316556256687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296000, while the sum is 64.

The spelling of 13316556256687 in words is "thirteen trillion, three hundred sixteen billion, five hundred fifty-six million, two hundred fifty-six thousand, six hundred eighty-seven".