12281737328 has 40 divisors (see below), whose sum is σ = 27209508480. Its totient is φ = 5260847040.

The previous prime is 12281737319. The next prime is 12281737343. The reversal of 12281737328 is 82373718221.

It is a Cunningham number, because it is equal to 110823²-1.

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, 193943 + ... + 249353.

It is an arithmetic number, because the mean of its divisors is an integer number (680237712).

Almost surely, 2^12281737328 is an apocalyptic number.

It is an amenable number.

12281737328 is an abundant number, since it is smaller than the sum of its proper divisors (14927771152).

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

12281737328 is a wasteful number, since it uses less digits than its factorization.

12281737328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57405 (or 57399 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The spelling of 12281737328 in words is "twelve billion, two hundred eighty-one million, seven hundred thirty-seven thousand, three hundred twenty-eight".