1381243540838 has 32 divisors (see below), whose sum is σ = 2402637603840. Its totient is φ = 583273645920.

The previous prime is 1381243540829. The next prime is 1381243540889. The reversal of 1381243540838 is 8380453421831.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1242695 + ... + 2075277.

It is an arithmetic number, because the mean of its divisors is an integer number (75082425120).

Almost surely, 2^{1381243540838} is an apocalyptic number.

1381243540838 is a deficient number, since it is larger than the sum of its proper divisors (1021394063002).

1381243540838 is a wasteful number, since it uses less digits than its factorization.

1381243540838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834332.

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 1381243540838 in words is "one trillion, three hundred eighty-one billion, two hundred forty-three million, five hundred forty thousand, eight hundred thirty-eight".