12540513244 has 12 divisors (see below), whose sum is σ = 25081026544. Its totient is φ = 5374505664.

The previous prime is 12540513217. The next prime is 12540513259. The reversal of 12540513244 is 44231504521.

12540513244 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223937709 + ... + 223937764.

Almost surely, 2^12540513244 is an apocalyptic number.

12540513244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12540513244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12540513244 is a wasteful number, since it uses less digits than its factorization.

12540513244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447875484 (or 447875482 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 12540513244 in words is "twelve billion, five hundred forty million, five hundred thirteen thousand, two hundred forty-four".