12536217252 has 144 divisors (see below), whose sum is σ = 37484952960. Its totient is φ = 3495343104.

The previous prime is 12536217247. The next prime is 12536217293. The reversal of 12536217252 is 25271263521.

12536217252 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 621 + 7 + 25 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 173868 + ... + 235164.

Almost surely, 2^12536217252 is an apocalyptic number.

12536217252 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 12536217252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18742476480).

12536217252 is an abundant number, since it is smaller than the sum of its proper divisors (24948735708).

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

12536217252 is a wasteful number, since it uses less digits than its factorization.

12536217252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61362 (or 61357 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The spelling of 12536217252 in words is "twelve billion, five hundred thirty-six million, two hundred seventeen thousand, two hundred fifty-two".