1381843305399 has 32 divisors (see below), whose sum is σ = 2023955136000. Its totient is φ = 834714080640.

The previous prime is 1381843305397. The next prime is 1381843305487. The reversal of 1381843305399 is 9935033481831.

It is not a de Polignac number, because 1381843305399 - 2¹ = 1381843305397 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381843305397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14569069 + ... + 14663609.

It is an arithmetic number, because the mean of its divisors is an integer number (63248598000).

Almost surely, 2^{1381843305399} is an apocalyptic number.

1381843305399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1381843305399 is a deficient number, since it is larger than the sum of its proper divisors (642111830601).

1381843305399 is a wasteful number, since it uses less digits than its factorization.

1381843305399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105735.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 1381843305399 in words is "one trillion, three hundred eighty-one billion, eight hundred forty-three million, three hundred five thousand, three hundred ninety-nine".