1355138752817 has 2 divisors, whose sum is σ = 1355138752818. Its totient is φ = 1355138752816.

The previous prime is 1355138752801. The next prime is 1355138752829. The reversal of 1355138752817 is 7182578315531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196046262321 + 159092490496 = 1093639^2 + 398864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355138752817 - 2⁴ = 1355138752801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1355138752837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677569376408 + 677569376409.

It is an arithmetic number, because the mean of its divisors is an integer number (677569376409).

Almost surely, 2^{1355138752817} is an apocalyptic number.

It is an amenable number.

1355138752817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355138752817 is an equidigital number, since it uses as much as digits as its factorization.

1355138752817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056000, while the sum is 56.

The spelling of 1355138752817 in words is "one trillion, three hundred fifty-five billion, one hundred thirty-eight million, seven hundred fifty-two thousand, eight hundred seventeen".