15680154120809 has 2 divisors, whose sum is σ = 15680154120810. Its totient is φ = 15680154120808.

The previous prime is 15680154120737. The next prime is 15680154120817. The reversal of 15680154120809 is 90802145108651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10295884038400 + 5384270082409 = 3208720^2 + 2320403^2 .

It is a cyclic number.

It is not a de Polignac number, because 15680154120809 - 2²⁴ = 15680137343593 is a prime.

It is not a weakly prime, because it can be changed into another prime (15680154125809) 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, 7840077060404 + 7840077060405.

It is an arithmetic number, because the mean of its divisors is an integer number (7840077060405).

Almost surely, 2^{15680154120809} is an apocalyptic number.

It is an amenable number.

15680154120809 is a deficient number, since it is larger than the sum of its proper divisors (1).

15680154120809 is an equidigital number, since it uses as much as digits as its factorization.

15680154120809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 50.

The spelling of 15680154120809 in words is "fifteen trillion, six hundred eighty billion, one hundred fifty-four million, one hundred twenty thousand, eight hundred nine".