1865746738813 has 2 divisors, whose sum is σ = 1865746738814. Its totient is φ = 1865746738812.

The previous prime is 1865746738811. The next prime is 1865746738859. The reversal of 1865746738813 is 3188376475681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1790573163129 + 75173575684 = 1338123^2 + 274178^2 .

It is a cyclic number.

It is not a de Polignac number, because 1865746738813 - 2¹ = 1865746738811 is a prime.

Together with 1865746738811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1865746738811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932873369406 + 932873369407.

It is an arithmetic number, because the mean of its divisors is an integer number (932873369407).

Almost surely, 2^{1865746738813} is an apocalyptic number.

It is an amenable number.

1865746738813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1865746738813 is an equidigital number, since it uses as much as digits as its factorization.

1865746738813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162570240, while the sum is 67.

The spelling of 1865746738813 in words is "one trillion, eight hundred sixty-five billion, seven hundred forty-six million, seven hundred thirty-eight thousand, eight hundred thirteen".