13449965821139 has 32 divisors (see below), whose sum is σ = 14327656358400. Its totient is φ = 12582145203712.

The previous prime is 13449965821093. The next prime is 13449965821177. The reversal of 13449965821139 is 93112856994431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13449965821139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13449965821739) 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, 6407795912 + ... + 6407798010.

It is an arithmetic number, because the mean of its divisors is an integer number (447739261200).

Almost surely, 2^{13449965821139} is an apocalyptic number.

13449965821139 is a deficient number, since it is larger than the sum of its proper divisors (877690537261).

13449965821139 is a wasteful number, since it uses less digits than its factorization.

13449965821139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4939.

The product of its digits is 50388480, while the sum is 65.

The spelling of 13449965821139 in words is "thirteen trillion, four hundred forty-nine billion, nine hundred sixty-five million, eight hundred twenty-one thousand, one hundred thirty-nine".