12961609052 has 24 divisors (see below), whose sum is σ = 26474778624. Its totient is φ = 5436783792.

The previous prime is 12961609039. The next prime is 12961609061. The reversal of 12961609052 is 25090616921.

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, 4923308 + ... + 4925939.

It is an arithmetic number, because the mean of its divisors is an integer number (1103115776).

Almost surely, 2^12961609052 is an apocalyptic number.

It is an amenable number.

12961609052 is an abundant number, since it is smaller than the sum of its proper divisors (13513169572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12961609052 is a wasteful number, since it uses less digits than its factorization.

12961609052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9849305 (or 9849303 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 12961609052 in words is "twelve billion, nine hundred sixty-one million, six hundred nine thousand, fifty-two".