12561263360 has 36 divisors (see below), whose sum is σ = 30088154208. Its totient is φ = 5024504832.

The previous prime is 12561263359. The next prime is 12561263383. The reversal of 12561263360 is 6336216521.

It is a self number, because there is not a number n which added to its sum of digits gives 12561263360.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4905464 + ... + 4908023.

Almost surely, 2^12561263360 is an apocalyptic number.

12561263360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12561263360 is an abundant number, since it is smaller than the sum of its proper divisors (17526890848).

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

12561263360 is an frugal number, since it uses more digits than its factorization.

12561263360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9813508 (or 9813494 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 12561263360 its reverse (6336216521), we get a palindrome (18897479881).

The spelling of 12561263360 in words is "twelve billion, five hundred sixty-one million, two hundred sixty-three thousand, three hundred sixty".