13509121878082 has 32 divisors (see below), whose sum is σ = 21268130083200. Its totient is φ = 6423281682048.

The previous prime is 13509121878017. The next prime is 13509121878113. The reversal of 13509121878082 is 28087812190531.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4263894 + ... + 6723022.

It is an arithmetic number, because the mean of its divisors is an integer number (664629065100).

Almost surely, 2^{13509121878082} is an apocalyptic number.

13509121878082 is a deficient number, since it is larger than the sum of its proper divisors (7759008205118).

13509121878082 is a wasteful number, since it uses less digits than its factorization.

13509121878082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459850.

The product of its (nonzero) digits is 1935360, while the sum is 55.

The spelling of 13509121878082 in words is "thirteen trillion, five hundred nine billion, one hundred twenty-one million, eight hundred seventy-eight thousand, eighty-two".