12169681089049 has 27 divisors (see below), whose sum is σ = 13512110777109. Its totient is φ = 10952377036920.

The previous prime is 12169681089017. The next prime is 12169681089061. The reversal of 12169681089049 is 94098018696121.

The square root of 12169681089049 is 3488507.

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

It is not a de Polignac number, because 12169681089049 - 2⁵ = 12169681089017 is a prime.

It is a super-2 number, since 2×12169681089049² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12169681089149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3952476892 + ... + 3952479970.

Almost surely, 2^{12169681089049} is an apocalyptic number.

12169681089049 is the 3488507-th square number.

12169681089049 is the 1744254-th centered octagonal number.

It is an amenable number.

12169681089049 is a deficient number, since it is larger than the sum of its proper divisors (1342429688060).

12169681089049 is an frugal number, since it uses more digits than its factorization.

12169681089049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386 (or 3193 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 64.

Multiplying 12169681089049 by its sum of digits (64), we get a square (778859589699136 = 27908056²).

The spelling of 12169681089049 in words is "twelve trillion, one hundred sixty-nine billion, six hundred eighty-one million, eighty-nine thousand, forty-nine".