13215065016520 has 32 divisors (see below), whose sum is σ = 29867232165120. Its totient is φ = 5262321850560.

The previous prime is 13215065016409. The next prime is 13215065016529. The reversal of 13215065016520 is 2561056051231.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13215065016520.

It is not an unprimeable number, because it can be changed into a prime (13215065016529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740745846 + ... + 740763685.

It is an arithmetic number, because the mean of its divisors is an integer number (933351005160).

Almost surely, 2^{13215065016520} is an apocalyptic number.

13215065016520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13215065016520 is an abundant number, since it is smaller than the sum of its proper divisors (16652167148600).

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

13215065016520 is a wasteful number, since it uses less digits than its factorization.

13215065016520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481509765 (or 1481509761 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 13215065016520 in words is "thirteen trillion, two hundred fifteen billion, sixty-five million, sixteen thousand, five hundred twenty".