15085363617809 has 2 divisors, whose sum is σ = 15085363617810. Its totient is φ = 15085363617808.

The previous prime is 15085363617791. The next prime is 15085363617829. The reversal of 15085363617809 is 90871636358051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14431238529409 + 654125088400 = 3798847^2 + 808780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15085363617809 is a prime.

It is not a weakly prime, because it can be changed into another prime (15085363617829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7542681808904 + 7542681808905.

It is an arithmetic number, because the mean of its divisors is an integer number (7542681808905).

Almost surely, 2^{15085363617809} is an apocalyptic number.

It is an amenable number.

15085363617809 is a deficient number, since it is larger than the sum of its proper divisors (1).

15085363617809 is an equidigital number, since it uses as much as digits as its factorization.

15085363617809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 15085363617809 in words is "fifteen trillion, eighty-five billion, three hundred sixty-three million, six hundred seventeen thousand, eight hundred nine".