135581868610212 has 96 divisors (see below), whose sum is σ = 329318975462400. Its totient is φ = 43362683280000.

The previous prime is 135581868610189. The next prime is 135581868610213. The reversal of 135581868610212 is 212016868185531.

It is not an unprimeable number, because it can be changed into a prime (135581868610213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36577887 + ... + 40113657.

It is an arithmetic number, because the mean of its divisors is an integer number (3430405994400).

Almost surely, 2^{135581868610212} is an apocalyptic number.

135581868610212 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 135581868610212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164659487731200).

135581868610212 is an abundant number, since it is smaller than the sum of its proper divisors (193737106852188).

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

135581868610212 is a wasteful number, since it uses less digits than its factorization.

135581868610212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536497 (or 3536495 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 57.

The spelling of 135581868610212 in words is "one hundred thirty-five trillion, five hundred eighty-one billion, eight hundred sixty-eight million, six hundred ten thousand, two hundred twelve".