12447506520 has 160 divisors (see below), whose sum is σ = 42858335520. Its totient is φ = 3238341120.

The previous prime is 12447506507. The next prime is 12447506563. The reversal of 12447506520 is 2560574421.

It is a happy number.

12447506520 is a `hidden beast` number, since 124 + 4 + 7 + 5 + 0 + 6 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 85989 + ... + 179691.

It is an arithmetic number, because the mean of its divisors is an integer number (267864597).

Almost surely, 2^12447506520 is an apocalyptic number.

12447506520 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 12447506520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21429167760).

12447506520 is an abundant number, since it is smaller than the sum of its proper divisors (30410829000).

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

12447506520 is a wasteful number, since it uses less digits than its factorization.

12447506520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93767 (or 93754 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 12447506520 in words is "twelve billion, four hundred forty-seven million, five hundred six thousand, five hundred twenty".