135421522542 has 64 divisors (see below), whose sum is σ = 304010807040. Its totient is φ = 44680124448.

The previous prime is 135421522447. The next prime is 135421522553. The reversal of 135421522542 is 245225124531.

135421522542 is a `hidden beast` number, since 1 + 3 + 5 + 421 + 5 + 225 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 135421522497 and 135421522506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7137913 + ... + 7156859.

It is an arithmetic number, because the mean of its divisors is an integer number (4750168860).

Almost surely, 2^135421522542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135421522542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152005403520).

135421522542 is an abundant number, since it is smaller than the sum of its proper divisors (168589284498).

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

135421522542 is a wasteful number, since it uses less digits than its factorization.

135421522542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20302 (or 20296 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The spelling of 135421522542 in words is "one hundred thirty-five billion, four hundred twenty-one million, five hundred twenty-two thousand, five hundred forty-two".