1217825054791 has 2 divisors, whose sum is σ = 1217825054792. Its totient is φ = 1217825054790.

The previous prime is 1217825054773. The next prime is 1217825054801. The reversal of 1217825054791 is 1974505287121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1217825054791 - 2¹⁷ = 1217824923719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217825054701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608912527395 + 608912527396.

It is an arithmetic number, because the mean of its divisors is an integer number (608912527396).

Almost surely, 2^{1217825054791} is an apocalyptic number.

1217825054791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217825054791 is an equidigital number, since it uses as much as digits as its factorization.

1217825054791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 1217825054791 in words is "one trillion, two hundred seventeen billion, eight hundred twenty-five million, fifty-four thousand, seven hundred ninety-one".