13004320215516 has 24 divisors (see below), whose sum is σ = 34678187241600. Its totient is φ = 3715520061552.

The previous prime is 13004320215499. The next prime is 13004320215541. The reversal of 13004320215516 is 61551202340031.

It is a super-2 number, since 2×13004320215516² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 77406667866 + ... + 77406668033.

It is an arithmetic number, because the mean of its divisors is an integer number (1444924468400).

Almost surely, 2^{13004320215516} is an apocalyptic number.

It is an amenable number.

13004320215516 is an abundant number, since it is smaller than the sum of its proper divisors (21673867026084).

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

13004320215516 is a wasteful number, since it uses less digits than its factorization.

13004320215516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154813335913 (or 154813335911 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 13004320215516 its reverse (61551202340031), we get a palindrome (74555522555547).

The spelling of 13004320215516 in words is "thirteen trillion, four billion, three hundred twenty million, two hundred fifteen thousand, five hundred sixteen".