12247137520 has 80 divisors (see below), whose sum is σ = 29738721600. Its totient is φ = 4681746432.

The previous prime is 12247137509. The next prime is 12247137533. The reversal of 12247137520 is 2573174221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2848012 + ... + 2852308.

It is an arithmetic number, because the mean of its divisors is an integer number (371734020).

Almost surely, 2^12247137520 is an apocalyptic number.

12247137520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12247137520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14869360800).

12247137520 is an abundant number, since it is smaller than the sum of its proper divisors (17491584080).

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

12247137520 is a wasteful number, since it uses less digits than its factorization.

12247137520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882 (or 5876 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 12247137520 in words is "twelve billion, two hundred forty-seven million, one hundred thirty-seven thousand, five hundred twenty".