13618322480665 has 12 divisors (see below), whose sum is σ = 19010066483556. Its totient is φ = 9338278272288.

The previous prime is 13618322480663. The next prime is 13618322480743. The reversal of 13618322480665 is 56608422381631.

It can be written as a sum of positive squares in 2 ways, for example, as 4585045777984 + 9033276702681 = 2141272^2 + 3005541^2 .

It is not a de Polignac number, because 13618322480665 - 2¹ = 13618322480663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13618322480663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27792494614 + ... + 27792495103.

It is an arithmetic number, because the mean of its divisors is an integer number (1584172206963).

Almost surely, 2^{13618322480665} is an apocalyptic number.

It is an amenable number.

13618322480665 is a deficient number, since it is larger than the sum of its proper divisors (5391744002891).

13618322480665 is an equidigital number, since it uses as much as digits as its factorization.

13618322480665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55584989736 (or 55584989729 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 13618322480665 in words is "thirteen trillion, six hundred eighteen billion, three hundred twenty-two million, four hundred eighty thousand, six hundred sixty-five".