13381789985 has 4 divisors (see below), whose sum is σ = 16058147988. Its totient is φ = 10705431984.

The previous prime is 13381789913. The next prime is 13381790047. The reversal of 13381789985 is 58998718331.

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 5990605201 + 7391184784 = 77399^2 + 85972^2 .

It is a cyclic number.

It is not a de Polignac number, because 13381789985 - 2¹⁰ = 13381788961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1338178994 + ... + 1338179003.

It is an arithmetic number, because the mean of its divisors is an integer number (4014536997).

Almost surely, 2^13381789985 is an apocalyptic number.

It is an amenable number.

13381789985 is a deficient number, since it is larger than the sum of its proper divisors (2676358003).

13381789985 is an equidigital number, since it uses as much as digits as its factorization.

13381789985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676358002.

The product of its digits is 13063680, while the sum is 62.

The spelling of 13381789985 in words is "thirteen billion, three hundred eighty-one million, seven hundred eighty-nine thousand, nine hundred eighty-five".