12581361332 has 12 divisors (see below), whose sum is σ = 22244366340. Its totient is φ = 6225828096.

The previous prime is 12581361323. The next prime is 12581361337. The reversal of 12581361332 is 23316318521.

It can be written as a sum of positive squares in 2 ways, for example, as 3526696996 + 9054664336 = 59386^2 + 95156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12581361292 and 12581361301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581361337) 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 3 ways as a sum of consecutive naturals, for example, 16212707 + ... + 16213482.

It is an arithmetic number, because the mean of its divisors is an integer number (1853697195).

Almost surely, 2^12581361332 is an apocalyptic number.

It is an amenable number.

12581361332 is a deficient number, since it is larger than the sum of its proper divisors (9663005008).

12581361332 is a wasteful number, since it uses less digits than its factorization.

12581361332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32426290 (or 32426288 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

Adding to 12581361332 its reverse (23316318521), we get a palindrome (35897679853).

The spelling of 12581361332 in words is "twelve billion, five hundred eighty-one million, three hundred sixty-one thousand, three hundred thirty-two".