5188511736721 has 2 divisors, whose sum is σ = 5188511736722. Its totient is φ = 5188511736720.

The previous prime is 5188511736701. The next prime is 5188511736773. The reversal of 5188511736721 is 1276371158815.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3335605460496 + 1852906276225 = 1826364^2 + 1361215^2 .

It is a cyclic number.

It is not a de Polignac number, because 5188511736721 - 2¹⁹ = 5188511212433 is a prime.

It is not a weakly prime, because it can be changed into another prime (5188511736701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2594255868360 + 2594255868361.

It is an arithmetic number, because the mean of its divisors is an integer number (2594255868361).

Almost surely, 2^{5188511736721} is an apocalyptic number.

It is an amenable number.

5188511736721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5188511736721 is an equidigital number, since it uses as much as digits as its factorization.

5188511736721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 55.

The spelling of 5188511736721 in words is "five trillion, one hundred eighty-eight billion, five hundred eleven million, seven hundred thirty-six thousand, seven hundred twenty-one".