12512869389 has 10 divisors (see below), whose sum is σ = 18692064270. Its totient is φ = 8341912872.

The previous prime is 12512869373. The next prime is 12512869393. The reversal of 12512869389 is 98396821521.

12512869389 is a `hidden beast` number, since 1 + 251 + 2 + 8 + 6 + 9 + 389 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6912592164 + 5600277225 = 83142^2 + 74835^2 .

It is not a de Polignac number, because 12512869389 - 2⁴ = 12512869373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12512869289) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 77239854 + ... + 77240015.

It is an arithmetic number, because the mean of its divisors is an integer number (1869206427).

Almost surely, 2^12512869389 is an apocalyptic number.

It is an amenable number.

12512869389 is a deficient number, since it is larger than the sum of its proper divisors (6179194881).

12512869389 is an equidigital number, since it uses as much as digits as its factorization.

12512869389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154479881 (or 154479872 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The spelling of 12512869389 in words is "twelve billion, five hundred twelve million, eight hundred sixty-nine thousand, three hundred eighty-nine".