12544251816 has 16 divisors (see below), whose sum is σ = 31360629600. Its totient is φ = 4181417264.

The previous prime is 12544251791. The next prime is 12544251817. The reversal of 12544251816 is 61815244521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12544251817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261338556 + ... + 261338603.

It is an arithmetic number, because the mean of its divisors is an integer number (1960039350).

Almost surely, 2^12544251816 is an apocalyptic number.

It is an amenable number.

12544251816 is an abundant number, since it is smaller than the sum of its proper divisors (18816377784).

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

12544251816 is a wasteful number, since it uses less digits than its factorization.

12544251816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522677168 (or 522677164 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The spelling of 12544251816 in words is "twelve billion, five hundred forty-four million, two hundred fifty-one thousand, eight hundred sixteen".