135565307218520 has 64 divisors (see below), whose sum is σ = 308704540677120. Its totient is φ = 53571470868864.

The previous prime is 135565307218499. The next prime is 135565307218597. The reversal of 135565307218520 is 25812703565531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139576889 + ... + 140544791.

It is an arithmetic number, because the mean of its divisors is an integer number (4823508448080).

Almost surely, 2^{135565307218520} is an apocalyptic number.

135565307218520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135565307218520 is an abundant number, since it is smaller than the sum of its proper divisors (173139233458600).

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

135565307218520 is a wasteful number, since it uses less digits than its factorization.

135565307218520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010184 (or 1010180 counting only the distinct ones).

The product of its (nonzero) digits is 7560000, while the sum is 53.

The spelling of 135565307218520 in words is "one hundred thirty-five trillion, five hundred sixty-five billion, three hundred seven million, two hundred eighteen thousand, five hundred twenty".