1217518345151 has 2 divisors, whose sum is σ = 1217518345152. Its totient is φ = 1217518345150.

The previous prime is 1217518345097. The next prime is 1217518345201. The reversal of 1217518345151 is 1515438157121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1217518345151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217518315151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608759172575 + 608759172576.

It is an arithmetic number, because the mean of its divisors is an integer number (608759172576).

Almost surely, 2^{1217518345151} is an apocalyptic number.

1217518345151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217518345151 is an equidigital number, since it uses as much as digits as its factorization.

1217518345151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168000, while the sum is 44.

The spelling of 1217518345151 in words is "one trillion, two hundred seventeen billion, five hundred eighteen million, three hundred forty-five thousand, one hundred fifty-one".