12427140856 has 64 divisors (see below), whose sum is σ = 26316864000. Its totient is φ = 5458451328.

The previous prime is 12427140853. The next prime is 12427140857. The reversal of 12427140856 is 65804172421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12427140853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 462955 + ... + 489061.

It is an arithmetic number, because the mean of its divisors is an integer number (411201000).

Almost surely, 2^12427140856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12427140856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13158432000).

12427140856 is an abundant number, since it is smaller than the sum of its proper divisors (13889723144).

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

12427140856 is a wasteful number, since it uses less digits than its factorization.

12427140856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26348 (or 26344 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 12427140856 in words is "twelve billion, four hundred twenty-seven million, one hundred forty thousand, eight hundred fifty-six".