13946315081 has 2 divisors, whose sum is σ = 13946315082. Its totient is φ = 13946315080.

The previous prime is 13946315069. The next prime is 13946315099. The reversal of 13946315081 is 18051364931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7657825081 + 6288490000 = 87509^2 + 79300^2 .

It is an emirp because it is prime and its reverse (18051364931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13946315081 is a prime.

It is a super-2 number, since 2×13946315081² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13946315011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6973157540 + 6973157541.

It is an arithmetic number, because the mean of its divisors is an integer number (6973157541).

Almost surely, 2^13946315081 is an apocalyptic number.

It is an amenable number.

13946315081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13946315081 is an equidigital number, since it uses as much as digits as its factorization.

13946315081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 13946315081 in words is "thirteen billion, nine hundred forty-six million, three hundred fifteen thousand, eighty-one".