13191543065749 has 2 divisors, whose sum is σ = 13191543065750. Its totient is φ = 13191543065748.

The previous prime is 13191543065741. The next prime is 13191543065761. The reversal of 13191543065749 is 94756034519131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10703320757649 + 2488222308100 = 3271593^2 + 1577410^2 .

It is an emirp because it is prime and its reverse (94756034519131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13191543065749 - 2³ = 13191543065741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13191543065693 and 13191543065702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13191543065741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6595771532874 + 6595771532875.

It is an arithmetic number, because the mean of its divisors is an integer number (6595771532875).

Almost surely, 2^{13191543065749} is an apocalyptic number.

It is an amenable number.

13191543065749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13191543065749 is an equidigital number, since it uses as much as digits as its factorization.

13191543065749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 58.

The spelling of 13191543065749 in words is "thirteen trillion, one hundred ninety-one billion, five hundred forty-three million, sixty-five thousand, seven hundred forty-nine".