1940665141338 has 32 divisors (see below), whose sum is σ = 4839061132800. Its totient is φ = 504068867760.

The previous prime is 1940665141309. The next prime is 1940665141361. The reversal of 1940665141338 is 8331415660491.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2100286488 + ... + 2100287411.

It is an arithmetic number, because the mean of its divisors is an integer number (151220660400).

Almost surely, 2^{1940665141338} is an apocalyptic number.

1940665141338 is an abundant number, since it is smaller than the sum of its proper divisors (2898395991462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1940665141338 is a wasteful number, since it uses less digits than its factorization.

1940665141338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200573922.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 1940665141338 in words is "one trillion, nine hundred forty billion, six hundred sixty-five million, one hundred forty-one thousand, three hundred thirty-eight".