1943818936538 has 16 divisors (see below), whose sum is σ = 3043192415616. Its totient is φ = 929440720560.

The previous prime is 1943818936537. The next prime is 1943818936573. The reversal of 1943818936538 is 8356398183491.

It is not an unprimeable number, because it can be changed into a prime (1943818936537) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4609781 + ... + 5013752.

It is an arithmetic number, because the mean of its divisors is an integer number (190199525976).

Almost surely, 2^{1943818936538} is an apocalyptic number.

1943818936538 is a deficient number, since it is larger than the sum of its proper divisors (1099373479078).

1943818936538 is a wasteful number, since it uses less digits than its factorization.

1943818936538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9627949.

The product of its digits is 134369280, while the sum is 68.

The spelling of 1943818936538 in words is "one trillion, nine hundred forty-three billion, eight hundred eighteen million, nine hundred thirty-six thousand, five hundred thirty-eight".