13571638449 has 8 divisors (see below), whose sum is σ = 18210776640. Its totient is φ = 8990129616.

The previous prime is 13571638417. The next prime is 13571638469. The reversal of 13571638449 is 94483617531.

13571638449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13571638449 - 2⁵ = 13571638417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13571638469) 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, 14406789 + ... + 14407730.

It is an arithmetic number, because the mean of its divisors is an integer number (2276347080).

Almost surely, 2^13571638449 is an apocalyptic number.

It is an amenable number.

13571638449 is a deficient number, since it is larger than the sum of its proper divisors (4639138191).

13571638449 is a wasteful number, since it uses less digits than its factorization.

13571638449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28814679.

The product of its digits is 2177280, while the sum is 51.

The spelling of 13571638449 in words is "thirteen billion, five hundred seventy-one million, six hundred thirty-eight thousand, four hundred forty-nine".