538263357817 has 2 divisors, whose sum is σ = 538263357818. Its totient is φ = 538263357816.

The previous prime is 538263357761. The next prime is 538263357823. The reversal of 538263357817 is 718753362835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429511147641 + 108752210176 = 655371^2 + 329776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538263357817 is a prime.

It is not a weakly prime, because it can be changed into another prime (538263357857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269131678908 + 269131678909.

It is an arithmetic number, because the mean of its divisors is an integer number (269131678909).

Almost surely, 2^538263357817 is an apocalyptic number.

It is an amenable number.

538263357817 is a deficient number, since it is larger than the sum of its proper divisors (1).

538263357817 is an equidigital number, since it uses as much as digits as its factorization.

538263357817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25401600, while the sum is 58.

The spelling of 538263357817 in words is "five hundred thirty-eight billion, two hundred sixty-three million, three hundred fifty-seven thousand, eight hundred seventeen".