15317661262441 has 2 divisors, whose sum is σ = 15317661262442. Its totient is φ = 15317661262440.

The previous prime is 15317661262331. The next prime is 15317661262517. The reversal of 15317661262441 is 14426216671351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15095439531225 + 222221731216 = 3885285^2 + 471404^2 .

It is an emirp because it is prime and its reverse (14426216671351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15317661262441 - 2¹³ = 15317661254249 is a prime.

It is not a weakly prime, because it can be changed into another prime (15317661263441) 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, 7658830631220 + 7658830631221.

It is an arithmetic number, because the mean of its divisors is an integer number (7658830631221).

Almost surely, 2^{15317661262441} is an apocalyptic number.

It is an amenable number.

15317661262441 is a deficient number, since it is larger than the sum of its proper divisors (1).

15317661262441 is an equidigital number, since it uses as much as digits as its factorization.

15317661262441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 49.

The spelling of 15317661262441 in words is "fifteen trillion, three hundred seventeen billion, six hundred sixty-one million, two hundred sixty-two thousand, four hundred forty-one".