1327638473389 has 4 divisors (see below), whose sum is σ = 1327672623420. Its totient is φ = 1327604323360.

The previous prime is 1327638473363. The next prime is 1327638473393. The reversal of 1327638473389 is 9833748367231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 231617925289 + 1096020548100 = 481267^2 + 1046910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1327638473389 - 2⁹ = 1327638472877 is a prime.

It is a super-2 number, since 2×1327638473389² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1327638473389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1327638476389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17016634 + ... + 17094475.

It is an arithmetic number, because the mean of its divisors is an integer number (331918155855).

Almost surely, 2^{1327638473389} is an apocalyptic number.

It is an amenable number.

1327638473389 is a deficient number, since it is larger than the sum of its proper divisors (34150031).

1327638473389 is an equidigital number, since it uses as much as digits as its factorization.

1327638473389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34150030.

The product of its digits is 109734912, while the sum is 64.

The spelling of 1327638473389 in words is "one trillion, three hundred twenty-seven billion, six hundred thirty-eight million, four hundred seventy-three thousand, three hundred eighty-nine".