135440520400520 has 32 divisors (see below), whose sum is σ = 306610748651520. Its totient is φ = 53843838782400.

The previous prime is 135440520400411. The next prime is 135440520400541. The reversal of 135440520400520 is 25004025044531.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10386536456 + ... + 10386549495.

It is an arithmetic number, because the mean of its divisors is an integer number (9581585895360).

Almost surely, 2^{135440520400520} is an apocalyptic number.

135440520400520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135440520400520 is an abundant number, since it is smaller than the sum of its proper divisors (171170228251000).

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

135440520400520 is a wasteful number, since it uses less digits than its factorization.

135440520400520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20773086125 (or 20773086121 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 135440520400520 in words is "one hundred thirty-five trillion, four hundred forty billion, five hundred twenty million, four hundred thousand, five hundred twenty".