13520655616 has 144 divisors (see below), whose sum is σ = 31379160960. Its totient is φ = 5762211840.

The previous prime is 13520655613. The next prime is 13520655619. The reversal of 13520655616 is 61655602531.

It is an interprime number because it is at equal distance from previous prime (13520655613) and next prime (13520655619).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520655613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2216731 + ... + 2222821.

It is an arithmetic number, because the mean of its divisors is an integer number (217910840).

Almost surely, 2^13520655616 is an apocalyptic number.

13520655616 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 13520655616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15689580480).

13520655616 is an abundant number, since it is smaller than the sum of its proper divisors (17858505344).

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

13520655616 is a wasteful number, since it uses less digits than its factorization.

13520655616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172 (or 6158 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 13520655616 in words is "thirteen billion, five hundred twenty million, six hundred fifty-five thousand, six hundred sixteen".