3840836591869 has 2 divisors, whose sum is σ = 3840836591870. Its totient is φ = 3840836591868.

The previous prime is 3840836591861. The next prime is 3840836591899. The reversal of 3840836591869 is 9681956380483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2535221848644 + 1305614743225 = 1592238^2 + 1142635^2 .

It is a cyclic number.

It is not a de Polignac number, because 3840836591869 - 2³ = 3840836591861 is a prime.

It is a super-2 number, since 2×3840836591869² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3840836591798 and 3840836591807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3840836591861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1920418295934 + 1920418295935.

It is an arithmetic number, because the mean of its divisors is an integer number (1920418295935).

Almost surely, 2^{3840836591869} is an apocalyptic number.

It is an amenable number.

3840836591869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3840836591869 is an equidigital number, since it uses as much as digits as its factorization.

3840836591869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268738560, while the sum is 70.

The spelling of 3840836591869 in words is "three trillion, eight hundred forty billion, eight hundred thirty-six million, five hundred ninety-one thousand, eight hundred sixty-nine".