13518480361 has 3 divisors (see below), whose sum is σ = 13518596631. Its totient is φ = 13518364092.

The previous prime is 13518480347. The next prime is 13518480383. The reversal of 13518480361 is 16308481531.

It is a happy number.

The square root of 13518480361 is 116269.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16308481531 = 17 ⋅959322443.

It can be written as a sum of positive squares in only one way, i.e., 12593103961 + 925376400 = 112219^2 + 30420^2 .

It is not a de Polignac number, because 13518480361 - 2¹³ = 13518472169 is a prime.

It is a super-2 number, since 2×13518480361² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13518480061) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 58135 + ... + 174403.

It is an arithmetic number, because the mean of its divisors is an integer number (4506198877).

Almost surely, 2^13518480361 is an apocalyptic number.

13518480361 is the 116269-th square number.

13518480361 is the 58135-th centered octagonal number.

It is an amenable number.

13518480361 is a deficient number, since it is larger than the sum of its proper divisors (116270).

13518480361 is an frugal number, since it uses more digits than its factorization.

13518480361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232538 (or 116269 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 13518480361 in words is "thirteen billion, five hundred eighteen million, four hundred eighty thousand, three hundred sixty-one".