13811545393 has 2 divisors, whose sum is σ = 13811545394. Its totient is φ = 13811545392.

The previous prime is 13811545373. The next prime is 13811545409. The reversal of 13811545393 is 39354511831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10042444944 + 3769100449 = 100212^2 + 61393^2 .

It is an emirp because it is prime and its reverse (39354511831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13811545393 - 2²⁹ = 13274674481 is a prime.

It is a super-2 number, since 2×13811545393² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13811545373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6905772696 + 6905772697.

It is an arithmetic number, because the mean of its divisors is an integer number (6905772697).

Almost surely, 2^13811545393 is an apocalyptic number.

It is an amenable number.

13811545393 is a deficient number, since it is larger than the sum of its proper divisors (1).

13811545393 is an equidigital number, since it uses as much as digits as its factorization.

13811545393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 43.

The spelling of 13811545393 in words is "thirteen billion, eight hundred eleven million, five hundred forty-five thousand, three hundred ninety-three".