12721851646488 has 96 divisors (see below), whose sum is σ = 34601378526000. Its totient is φ = 4222606694400.

The previous prime is 12721851646477. The next prime is 12721851646507. The reversal of 12721851646488 is 88464615812721.

12721851646488 is a `hidden beast` number, since 1 + 2 + 7 + 2 + 1 + 85 + 16 + 464 + 88 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213070063 + ... + 213129761.

Almost surely, 2^{12721851646488} is an apocalyptic number.

12721851646488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12721851646488 is an abundant number, since it is smaller than the sum of its proper divisors (21879526879512).

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

12721851646488 is a wasteful number, since it uses less digits than its factorization.

12721851646488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72233 (or 72226 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 63.

The spelling of 12721851646488 in words is "twelve trillion, seven hundred twenty-one billion, eight hundred fifty-one million, six hundred forty-six thousand, four hundred eighty-eight".