135421530444 has 72 divisors (see below), whose sum is σ = 360881495520. Its totient is φ = 42732721152.

The previous prime is 135421530389. The next prime is 135421530457. The reversal of 135421530444 is 444035124531.

135421530444 is a `hidden beast` number, since 13 + 54 + 2 + 153 + 0 + 444 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 135421530399 and 135421530408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 762739 + ... + 923370.

Almost surely, 2^135421530444 is an apocalyptic number.

It is an amenable number.

135421530444 is an abundant number, since it is smaller than the sum of its proper divisors (225459965076).

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

135421530444 is a wasteful number, since it uses less digits than its factorization.

135421530444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686239 (or 1686234 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 135421530444 its reverse (444035124531), we get a palindrome (579456654975).

The spelling of 135421530444 in words is "one hundred thirty-five billion, four hundred twenty-one million, five hundred thirty thousand, four hundred forty-four".