135423230520 has 64 divisors (see below), whose sum is σ = 408618133920. Its totient is φ = 35904111104.

The previous prime is 135423230513. The next prime is 135423230539. The reversal of 135423230520 is 25032324531.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3240879 + ... + 3282398.

Almost surely, 2^135423230520 is an apocalyptic number.

135423230520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135423230520 is an abundant number, since it is smaller than the sum of its proper divisors (273194903400).

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

135423230520 is a wasteful number, since it uses less digits than its factorization.

135423230520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523464 (or 6523460 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The spelling of 135423230520 in words is "one hundred thirty-five billion, four hundred twenty-three million, two hundred thirty thousand, five hundred twenty".