13165515616 has 48 divisors (see below), whose sum is σ = 28323440208. Its totient is φ = 5974272000.

The previous prime is 13165515593. The next prime is 13165515619. The reversal of 13165515616 is 61651556131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13165515619) 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, 180436 + ... + 242668.

It is an arithmetic number, because the mean of its divisors is an integer number (590071671).

Almost surely, 2^13165515616 is an apocalyptic number.

13165515616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13165515616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14161720104).

13165515616 is an abundant number, since it is smaller than the sum of its proper divisors (15157924592).

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

13165515616 is a wasteful number, since it uses less digits than its factorization.

13165515616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62855 (or 62847 counting only the distinct ones).

The product of its digits is 81000, while the sum is 40.

It can be divided in two parts, 13165515 and 616, that added together give a palindrome (13166131).

The spelling of 13165515616 in words is "thirteen billion, one hundred sixty-five million, five hundred fifteen thousand, six hundred sixteen".