12556135332 has 144 divisors (see below), whose sum is σ = 38096472960. Its totient is φ = 3444747264.

The previous prime is 12556135301. The next prime is 12556135343. The reversal of 12556135332 is 23353165521.

12556135332 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 613 + 5 + 3 + 32 = 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109633 + ... + 192695.

It is an arithmetic number, because the mean of its divisors is an integer number (264558840).

Almost surely, 2^12556135332 is an apocalyptic number.

12556135332 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 12556135332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19048236480).

12556135332 is an abundant number, since it is smaller than the sum of its proper divisors (25540337628).

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

12556135332 is a wasteful number, since it uses less digits than its factorization.

12556135332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83122 (or 83117 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The spelling of 12556135332 in words is "twelve billion, five hundred fifty-six million, one hundred thirty-five thousand, three hundred thirty-two".