15866362241 has 2 divisors, whose sum is σ = 15866362242. Its totient is φ = 15866362240.

The previous prime is 15866362223. The next prime is 15866362273. The reversal of 15866362241 is 14226366851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15228547216 + 637815025 = 123404^2 + 25255^2 .

It is a cyclic number.

It is not a de Polignac number, because 15866362241 - 2²⁶ = 15799253377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15866362192 and 15866362201.

It is not a weakly prime, because it can be changed into another prime (15866562241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7933181120 + 7933181121.

It is an arithmetic number, because the mean of its divisors is an integer number (7933181121).

Almost surely, 2^15866362241 is an apocalyptic number.

It is an amenable number.

15866362241 is a deficient number, since it is larger than the sum of its proper divisors (1).

15866362241 is an equidigital number, since it uses as much as digits as its factorization.

15866362241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The spelling of 15866362241 in words is "fifteen billion, eight hundred sixty-six million, three hundred sixty-two thousand, two hundred forty-one".