136566681473 has 2 divisors, whose sum is σ = 136566681474. Its totient is φ = 136566681472.

The previous prime is 136566681413. The next prime is 136566681481. The reversal of 136566681473 is 374186665631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71892088129 + 64674593344 = 268127^2 + 254312^2 .

It is a cyclic number.

It is not a de Polignac number, because 136566681473 - 2⁸ = 136566681217 is a prime.

It is not a weakly prime, because it can be changed into another prime (136566681403) 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, 68283340736 + 68283340737.

It is an arithmetic number, because the mean of its divisors is an integer number (68283340737).

Almost surely, 2^136566681473 is an apocalyptic number.

It is an amenable number.

136566681473 is a deficient number, since it is larger than the sum of its proper divisors (1).

136566681473 is an equidigital number, since it uses as much as digits as its factorization.

136566681473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 56.

The spelling of 136566681473 in words is "one hundred thirty-six billion, five hundred sixty-six million, six hundred eighty-one thousand, four hundred seventy-three".