12856812045720 has 64 divisors (see below), whose sum is σ = 38735974573920. Its totient is φ = 3413768684544.

The previous prime is 12856812045683. The next prime is 12856812045739. The reversal of 12856812045720 is 2754021865821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229886419 + ... + 229942338.

Almost surely, 2^{12856812045720} is an apocalyptic number.

12856812045720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12856812045720 is an abundant number, since it is smaller than the sum of its proper divisors (25879162528200).

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

12856812045720 is a wasteful number, since it uses less digits than its factorization.

12856812045720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459829004 (or 459829000 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 12856812045720 in words is "twelve trillion, eight hundred fifty-six billion, eight hundred twelve million, forty-five thousand, seven hundred twenty".