12187445652 has 240 divisors, whose sum is σ = 34748683200. Its totient is φ = 3711951360.

The previous prime is 12187445629. The next prime is 12187445687. The reversal of 12187445652 is 25654478121.

12187445652 is a `hidden beast` number, since 1 + 2 + 1 + 87 + 4 + 4 + 565 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12187445598 and 12187445607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 27510943 + ... + 27511385.

It is an arithmetic number, because the mean of its divisors is an integer number (144786180).

Almost surely, 2^12187445652 is an apocalyptic number.

12187445652 is a gapful number since it is divisible by the number (12) 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 12187445652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17374341600).

12187445652 is an abundant number, since it is smaller than the sum of its proper divisors (22561237548).

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

12187445652 is a wasteful number, since it uses less digits than its factorization.

12187445652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 617 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The spelling of 12187445652 in words is "twelve billion, one hundred eighty-seven million, four hundred forty-five thousand, six hundred fifty-two".