135521325544 has 64 divisors (see below), whose sum is σ = 287963786880. Its totient is φ = 59251584000.

The previous prime is 135521325451. The next prime is 135521325551. The reversal of 135521325544 is 445523125531.

It is a junction number, because it is equal to n+sod(n) for n = 135521325497 and 135521325506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8349 + ... + 520684.

It is an arithmetic number, because the mean of its divisors is an integer number (4499434170).

Almost surely, 2^135521325544 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 135521325544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143981893440).

135521325544 is an abundant number, since it is smaller than the sum of its proper divisors (152442461336).

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

135521325544 is a wasteful number, since it uses less digits than its factorization.

135521325544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529162 (or 529158 counting only the distinct ones).

The product of its digits is 360000, while the sum is 40.

The spelling of 135521325544 in words is "one hundred thirty-five billion, five hundred twenty-one million, three hundred twenty-five thousand, five hundred forty-four".