135520012544 has 72 divisors (see below), whose sum is σ = 313390331520. Its totient is φ = 57284333568.

The previous prime is 135520012543. The next prime is 135520012547. The reversal of 135520012544 is 445210025531.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 135520012544.

It is not an unprimeable number, because it can be changed into a prime (135520012543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387164 + ... + 648795.

Almost surely, 2^135520012544 is an apocalyptic number.

135520012544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

135520012544 is an abundant number, since it is smaller than the sum of its proper divisors (177870318976).

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

135520012544 is an equidigital number, since it uses as much as digits as its factorization.

135520012544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036055 (or 1036041 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 135520012544 in words is "one hundred thirty-five billion, five hundred twenty million, twelve thousand, five hundred forty-four".