135240044520 has 256 divisors, whose sum is σ = 490228992000. Its totient is φ = 29156391936.

The previous prime is 135240044507. The next prime is 135240044581. The reversal of 135240044520 is 25440042531.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3636339 + ... + 3673341.

It is an arithmetic number, because the mean of its divisors is an integer number (1914957000).

Almost surely, 2^135240044520 is an apocalyptic number.

135240044520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135240044520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245114496000).

135240044520 is an abundant number, since it is smaller than the sum of its proper divisors (354988947480).

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

135240044520 is a wasteful number, since it uses less digits than its factorization.

135240044520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37272 (or 37268 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 135240044520 in words is "one hundred thirty-five billion, two hundred forty million, forty-four thousand, five hundred twenty".