13166962934561 has 2 divisors, whose sum is σ = 13166962934562. Its totient is φ = 13166962934560.

The previous prime is 13166962934539. The next prime is 13166962934569. The reversal of 13166962934561 is 16543926966131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13166962934161 + 400 = 3628631^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 13166962934561 - 2⁴² = 8768916423457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13166962934494 and 13166962934503.

It is not a weakly prime, because it can be changed into another prime (13166962934569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6583481467280 + 6583481467281.

It is an arithmetic number, because the mean of its divisors is an integer number (6583481467281).

Almost surely, 2^{13166962934561} is an apocalyptic number.

It is an amenable number.

13166962934561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13166962934561 is an equidigital number, since it uses as much as digits as its factorization.

13166962934561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37791360, while the sum is 62.

The spelling of 13166962934561 in words is "thirteen trillion, one hundred sixty-six billion, nine hundred sixty-two million, nine hundred thirty-four thousand, five hundred sixty-one".