1381844394841 has 4 divisors (see below), whose sum is σ = 1381981072384. Its totient is φ = 1381707717300.

The previous prime is 1381844394769. The next prime is 1381844394893. The reversal of 1381844394841 is 1484934481831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1381844394841 - 2¹⁹ = 1381843870553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381844394041) 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, 68323605 + ... + 68343826.

It is an arithmetic number, because the mean of its divisors is an integer number (345495268096).

Almost surely, 2^{1381844394841} is an apocalyptic number.

It is an amenable number.

1381844394841 is a deficient number, since it is larger than the sum of its proper divisors (136677543).

1381844394841 is a wasteful number, since it uses less digits than its factorization.

1381844394841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136677542.

The product of its digits is 10616832, while the sum is 58.

The spelling of 1381844394841 in words is "one trillion, three hundred eighty-one billion, eight hundred forty-four million, three hundred ninety-four thousand, eight hundred forty-one".