13509513448878 has 16 divisors (see below), whose sum is σ = 27019120337280. Its totient is φ = 4503155576376.

The previous prime is 13509513448877. The next prime is 13509513448897. The reversal of 13509513448878 is 87884431590531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13509513448877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1938250 + ... + 5547597.

It is an arithmetic number, because the mean of its divisors is an integer number (1688695021080).

Almost surely, 2^{13509513448878} is an apocalyptic number.

13509513448878 is an abundant number, since it is smaller than the sum of its proper divisors (13509606888402).

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

13509513448878 is a wasteful number, since it uses less digits than its factorization.

13509513448878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786631.

The product of its (nonzero) digits is 116121600, while the sum is 66.

The spelling of 13509513448878 in words is "thirteen trillion, five hundred nine billion, five hundred thirteen million, four hundred forty-eight thousand, eight hundred seventy-eight".