13840316081 has 4 divisors (see below), whose sum is σ = 13840624164. Its totient is φ = 13840008000.

The previous prime is 13840316057. The next prime is 13840316123. The reversal of 13840316081 is 18061304831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18061304831 = 983 ⋅18373657.

It can be written as a sum of positive squares in 2 ways, for example, as 6594901681 + 7245414400 = 81209^2 + 85120^2 .

It is a cyclic number.

It is not a de Polignac number, because 13840316081 - 2¹⁰ = 13840315057 is a prime.

It is a super-2 number, since 2×13840316081² (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 (13840316011) 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 3 ways as a sum of consecutive naturals, for example, 72140 + ... + 181341.

It is an arithmetic number, because the mean of its divisors is an integer number (3460156041).

Almost surely, 2^13840316081 is an apocalyptic number.

It is an amenable number.

13840316081 is a deficient number, since it is larger than the sum of its proper divisors (308083).

13840316081 is an equidigital number, since it uses as much as digits as its factorization.

13840316081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308082.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 13840316081 in words is "thirteen billion, eight hundred forty million, three hundred sixteen thousand, eighty-one".