15817172849141 has 2 divisors, whose sum is σ = 15817172849142. Its totient is φ = 15817172849140.

The previous prime is 15817172849113. The next prime is 15817172849171. The reversal of 15817172849141 is 14194827171851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15774170532241 + 43002316900 = 3971671^2 + 207370^2 .

It is a cyclic number.

It is not a de Polignac number, because 15817172849141 - 2³⁴ = 15799992979957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15817172849171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7908586424570 + 7908586424571.

It is an arithmetic number, because the mean of its divisors is an integer number (7908586424571).

Almost surely, 2^{15817172849141} is an apocalyptic number.

It is an amenable number.

15817172849141 is a deficient number, since it is larger than the sum of its proper divisors (1).

15817172849141 is an equidigital number, since it uses as much as digits as its factorization.

15817172849141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4515840, while the sum is 59.

The spelling of 15817172849141 in words is "fifteen trillion, eight hundred seventeen billion, one hundred seventy-two million, eight hundred forty-nine thousand, one hundred forty-one".