1865989068137 has 2 divisors, whose sum is σ = 1865989068138. Its totient is φ = 1865989068136.

The previous prime is 1865989068079. The next prime is 1865989068211. The reversal of 1865989068137 is 7318609895681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1770999362521 + 94989705616 = 1330789^2 + 308204^2 .

It is a cyclic number.

It is not a de Polignac number, because 1865989068137 - 2¹⁴ = 1865989051753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1865989068737) 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, 932994534068 + 932994534069.

It is an arithmetic number, because the mean of its divisors is an integer number (932994534069).

Almost surely, 2^{1865989068137} is an apocalyptic number.

It is an amenable number.

1865989068137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1865989068137 is an equidigital number, since it uses as much as digits as its factorization.

1865989068137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156764160, while the sum is 71.

The spelling of 1865989068137 in words is "one trillion, eight hundred sixty-five billion, nine hundred eighty-nine million, sixty-eight thousand, one hundred thirty-seven".