1865405742037 has 2 divisors, whose sum is σ = 1865405742038. Its totient is φ = 1865405742036.

The previous prime is 1865405742019. The next prime is 1865405742089. The reversal of 1865405742037 is 7302475045681.

It is an a-pointer prime, because the next prime (1865405742089) can be obtained adding 1865405742037 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1627872326161 + 237533415876 = 1275881^2 + 487374^2 .

It is a cyclic number.

It is not a de Polignac number, because 1865405742037 - 2¹⁵ = 1865405709269 is a prime.

It is a super-3 number, since 3×1865405742037³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1865405742097) 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, 932702871018 + 932702871019.

It is an arithmetic number, because the mean of its divisors is an integer number (932702871019).

Almost surely, 2^{1865405742037} is an apocalyptic number.

It is an amenable number.

1865405742037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1865405742037 is an equidigital number, since it uses as much as digits as its factorization.

1865405742037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5644800, while the sum is 52.

The spelling of 1865405742037 in words is "one trillion, eight hundred sixty-five billion, four hundred five million, seven hundred forty-two thousand, thirty-seven".