13149899385841 has 3 divisors (see below), whose sum is σ = 13149903012121. Its totient is φ = 13149895759562.

The previous prime is 13149899385797. The next prime is 13149899385881. The reversal of 13149899385841 is 14858399894131.

The square root of 13149899385841 is 3626279.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 13149899385841 - 2²⁹ = 13149362514929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13149899385881) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1813140 + ... + 5439418.

Almost surely, 2^{13149899385841} is an apocalyptic number.

13149899385841 is the 3626279-th square number.

13149899385841 is the 1813140-th centered octagonal number.

It is an amenable number.

13149899385841 is a deficient number, since it is larger than the sum of its proper divisors (3626280).

13149899385841 is an frugal number, since it uses more digits than its factorization.

13149899385841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7252558 (or 3626279 counting only the distinct ones).

The product of its digits is 268738560, while the sum is 73.

The spelling of 13149899385841 in words is "thirteen trillion, one hundred forty-nine billion, eight hundred ninety-nine million, three hundred eighty-five thousand, eight hundred forty-one".