12961689364 has 24 divisors (see below), whose sum is σ = 24452546048. Its totient is φ = 5976257760.

The previous prime is 12961689359. The next prime is 12961689379. The reversal of 12961689364 is 46398616921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74232 + ... + 177295.

Almost surely, 2^12961689364 is an apocalyptic number.

It is an amenable number.

12961689364 is a deficient number, since it is larger than the sum of its proper divisors (11490856684).

12961689364 is a wasteful number, since it uses less digits than its factorization.

12961689364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252535 (or 252533 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The spelling of 12961689364 in words is "twelve billion, nine hundred sixty-one million, six hundred eighty-nine thousand, three hundred sixty-four".