135261605424 has 80 divisors (see below), whose sum is σ = 381506832000. Its totient is φ = 40954490880.

The previous prime is 135261605363. The next prime is 135261605431. The reversal of 135261605424 is 424506162531.

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, 537327 + ... + 747825.

It is an arithmetic number, because the mean of its divisors is an integer number (4768835400).

Almost surely, 2^135261605424 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 135261605424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190753416000).

135261605424 is an abundant number, since it is smaller than the sum of its proper divisors (246245226576).

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

135261605424 is a wasteful number, since it uses less digits than its factorization.

135261605424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211738 (or 211732 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 135261605424 its reverse (424506162531), we get a palindrome (559767767955).

The spelling of 135261605424 in words is "one hundred thirty-five billion, two hundred sixty-one million, six hundred five thousand, four hundred twenty-four".