1383805185943 has 4 divisors (see below), whose sum is σ = 1388312695000. Its totient is φ = 1379297676888.

The previous prime is 1383805185859. The next prime is 1383805186007. The reversal of 1383805185943 is 3495815083831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1383805185943 - 2⁹ = 1383805185431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383805485943) 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, 2253754068 + ... + 2253754681.

It is an arithmetic number, because the mean of its divisors is an integer number (347078173750).

Almost surely, 2^{1383805185943} is an apocalyptic number.

1383805185943 is a deficient number, since it is larger than the sum of its proper divisors (4507509057).

1383805185943 is an equidigital number, since it uses as much as digits as its factorization.

1383805185943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507509056.

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 1383805185943 in words is "one trillion, three hundred eighty-three billion, eight hundred five million, one hundred eighty-five thousand, nine hundred forty-three".