3871381666144 has 24 divisors (see below), whose sum is σ = 7629336517320. Its totient is φ = 1933772391936.

The previous prime is 3871381666133. The next prime is 3871381666147. The reversal of 3871381666144 is 4416661831783.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871381666147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59918494 + ... + 59983069.

It is an arithmetic number, because the mean of its divisors is an integer number (317889021555).

Almost surely, 2^{3871381666144} is an apocalyptic number.

It is an amenable number.

3871381666144 is a deficient number, since it is larger than the sum of its proper divisors (3757954851176).

3871381666144 is a wasteful number, since it uses less digits than its factorization.

3871381666144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119902582 (or 119902574 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 58.

The spelling of 3871381666144 in words is "three trillion, eight hundred seventy-one billion, three hundred eighty-one million, six hundred sixty-six thousand, one hundred forty-four".