13693768643 has 2 divisors, whose sum is σ = 13693768644. Its totient is φ = 13693768642.

The previous prime is 13693768603. The next prime is 13693768661. The reversal of 13693768643 is 34686739631.

It is a strong prime.

It is an emirp because it is prime and its reverse (34686739631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13693768643 - 2¹⁸ = 13693506499 is a prime.

It is a super-2 number, since 2×13693768643² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13693768603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6846884321 + 6846884322.

It is an arithmetic number, because the mean of its divisors is an integer number (6846884322).

Almost surely, 2^13693768643 is an apocalyptic number.

13693768643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13693768643 is an equidigital number, since it uses as much as digits as its factorization.

13693768643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 56.

The spelling of 13693768643 in words is "thirteen billion, six hundred ninety-three million, seven hundred sixty-eight thousand, six hundred forty-three".