12851169769 has 3 divisors (see below), whose sum is σ = 12851283133. Its totient is φ = 12851056406.

The previous prime is 12851169767. The next prime is 12851169797. The reversal of 12851169769 is 96796115821.

It is a happy number.

The square root of 12851169769 is 113363.

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 12851169769 - 2¹ = 12851169767 is a prime.

It is a super-2 number, since 2×12851169769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12851169763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 56682 + ... + 170044.

Almost surely, 2^12851169769 is an apocalyptic number.

12851169769 is the 113363-rd square number.

12851169769 is the 56682-nd centered octagonal number.

It is an amenable number.

12851169769 is a deficient number, since it is larger than the sum of its proper divisors (113364).

12851169769 is an frugal number, since it uses more digits than its factorization.

12851169769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226726 (or 113363 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 55.

The spelling of 12851169769 in words is "twelve billion, eight hundred fifty-one million, one hundred sixty-nine thousand, seven hundred sixty-nine".