12694861249 has 6 divisors (see below), whose sum is σ = 14767491714. Its totient is φ = 10881309600.

The previous prime is 12694861183. The next prime is 12694861271. The reversal of 12694861249 is 94216849621.

12694861249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11547006849 + 1147854400 = 107457^2 + 33880^2 .

It is not a de Polignac number, because 12694861249 - 2¹⁷ = 12694730177 is a prime.

It is a super-2 number, since 2×12694861249² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12694861196 and 12694861205.

It is not an unprimeable number, because it can be changed into a prime (12694861849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129539352 + ... + 129539449.

It is an arithmetic number, because the mean of its divisors is an integer number (2461248619).

Almost surely, 2^12694861249 is an apocalyptic number.

It is an amenable number.

12694861249 is a deficient number, since it is larger than the sum of its proper divisors (2072630465).

12694861249 is an equidigital number, since it uses as much as digits as its factorization.

12694861249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259078815 (or 259078808 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 52.

The spelling of 12694861249 in words is "twelve billion, six hundred ninety-four million, eight hundred sixty-one thousand, two hundred forty-nine".