3861867517643 has 2 divisors, whose sum is σ = 3861867517644. Its totient is φ = 3861867517642.

The previous prime is 3861867517639. The next prime is 3861867517661. The reversal of 3861867517643 is 3467157681683.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3861867517643 - 2² = 3861867517639 is a prime.

It is a super-2 number, since 2×3861867517643² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3861867517643.

It is not a weakly prime, because it can be changed into another prime (3861867517693) 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, 1930933758821 + 1930933758822.

It is an arithmetic number, because the mean of its divisors is an integer number (1930933758822).

Almost surely, 2^{3861867517643} is an apocalyptic number.

3861867517643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861867517643 is an equidigital number, since it uses as much as digits as its factorization.

3861867517643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 65.

The spelling of 3861867517643 in words is "three trillion, eight hundred sixty-one billion, eight hundred sixty-seven million, five hundred seventeen thousand, six hundred forty-three".