135439604636 has 96 divisors (see below), whose sum is σ = 293536320000. Its totient is φ = 54502689024.

The previous prime is 135439604633. The next prime is 135439604647. The reversal of 135439604636 is 636406934531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135439604633) 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, 2922695 + ... + 2968673.

It is an arithmetic number, because the mean of its divisors is an integer number (3057670000).

Almost surely, 2^135439604636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135439604636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146768160000).

135439604636 is an abundant number, since it is smaller than the sum of its proper divisors (158096715364).

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

135439604636 is a wasteful number, since it uses less digits than its factorization.

135439604636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46136 (or 46120 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 50.

The spelling of 135439604636 in words is "one hundred thirty-five billion, four hundred thirty-nine million, six hundred four thousand, six hundred thirty-six".