12581947992 has 16 divisors (see below), whose sum is σ = 31454870040. Its totient is φ = 4193982656.

The previous prime is 12581947969. The next prime is 12581947997. The reversal of 12581947992 is 29974918521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581947997) 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, 262123893 + ... + 262123940.

Almost surely, 2^12581947992 is an apocalyptic number.

12581947992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12581947992 is an abundant number, since it is smaller than the sum of its proper divisors (18872922048).

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

12581947992 is a wasteful number, since it uses less digits than its factorization.

12581947992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524247842 (or 524247838 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 57.

The spelling of 12581947992 in words is "twelve billion, five hundred eighty-one million, nine hundred forty-seven thousand, nine hundred ninety-two".