12849980887969 has 9 divisors (see below), whose sum is σ = 13006966388403. Its totient is φ = 12694867896792.

The previous prime is 12849980887957. The next prime is 12849980887979. The reversal of 12849980887969 is 96978808994821.

The square root of 12849980887969 is 3584687.

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

It can be written as a sum of positive squares in only one way, i.e., 312857879569 + 12537123008400 = 559337^2 + 3540780^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12849980887969 is a prime.

It is a super-2 number, since 2×12849980887969² (a number of 27 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 12849980887969.

It is not an unprimeable number, because it can be changed into a prime (12849980887979) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 297507427 + ... + 297550615.

Almost surely, 2^{12849980887969} is an apocalyptic number.

12849980887969 is the 3584687-th square number.

12849980887969 is the 1792344-th centered octagonal number.

It is an amenable number.

12849980887969 is a deficient number, since it is larger than the sum of its proper divisors (156985500434).

12849980887969 is an frugal number, since it uses more digits than its factorization.

12849980887969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86544 (or 43272 counting only the distinct ones).

The product of its (nonzero) digits is 9029615616, while the sum is 88.

The spelling of 12849980887969 in words is "twelve trillion, eight hundred forty-nine billion, nine hundred eighty million, eight hundred eighty-seven thousand, nine hundred sixty-nine".