1381442078138 has 32 divisors (see below), whose sum is σ = 2246986925568. Its totient is φ = 634588192000.

The previous prime is 1381442078119. The next prime is 1381442078153. The reversal of 1381442078138 is 8318702441831.

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, 2589170 + ... + 3076797.

It is an arithmetic number, because the mean of its divisors is an integer number (70218341424).

Almost surely, 2^{1381442078138} is an apocalyptic number.

1381442078138 is a deficient number, since it is larger than the sum of its proper divisors (865544847430).

1381442078138 is a wasteful number, since it uses less digits than its factorization.

1381442078138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5666158.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 1381442078138 in words is "one trillion, three hundred eighty-one billion, four hundred forty-two million, seventy-eight thousand, one hundred thirty-eight".