12407840856 has 24 divisors (see below), whose sum is σ = 33604569180. Its totient is φ = 4135946928.

The previous prime is 12407840839. The next prime is 12407840857. The reversal of 12407840856 is 65804870421.

12407840856 is a `hidden beast` number, since 124 + 0 + 78 + 408 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12407840857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86165490 + ... + 86165633.

Almost surely, 2^12407840856 is an apocalyptic number.

It is an amenable number.

12407840856 is an abundant number, since it is smaller than the sum of its proper divisors (21196728324).

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

12407840856 is a wasteful number, since it uses less digits than its factorization.

12407840856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172331135 (or 172331128 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 12407840856 in words is "twelve billion, four hundred seven million, eight hundred forty thousand, eight hundred fifty-six".