3871687266841 has 4 divisors (see below), whose sum is σ = 3871872917812. Its totient is φ = 3871501615872.

The previous prime is 3871687266827. The next prime is 3871687266851. The reversal of 3871687266841 is 1486627861783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3724822800400 + 146864466441 = 1929980^2 + 383229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3871687266841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3871687266851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92794200 + ... + 92835913.

It is an arithmetic number, because the mean of its divisors is an integer number (967968229453).

Almost surely, 2^{3871687266841} is an apocalyptic number.

It is an amenable number.

3871687266841 is a deficient number, since it is larger than the sum of its proper divisors (185650971).

3871687266841 is a wasteful number, since it uses less digits than its factorization.

3871687266841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185650970.

The product of its digits is 130056192, while the sum is 67.

The spelling of 3871687266841 in words is "three trillion, eight hundred seventy-one billion, six hundred eighty-seven million, two hundred sixty-six thousand, eight hundred forty-one".