797436254521 has 2 divisors, whose sum is σ = 797436254522. Its totient is φ = 797436254520.

The previous prime is 797436254509. The next prime is 797436254579. The reversal of 797436254521 is 125452634797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792375924025 + 5060330496 = 890155^2 + 71136^2 .

It is a cyclic number.

It is not a de Polignac number, because 797436254521 - 2¹⁹ = 797435730233 is a prime.

It is not a weakly prime, because it can be changed into another prime (797436254581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398718127260 + 398718127261.

It is an arithmetic number, because the mean of its divisors is an integer number (398718127261).

Almost surely, 2^797436254521 is an apocalyptic number.

It is an amenable number.

797436254521 is a deficient number, since it is larger than the sum of its proper divisors (1).

797436254521 is an equidigital number, since it uses as much as digits as its factorization.

797436254521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12700800, while the sum is 55.

The spelling of 797436254521 in words is "seven hundred ninety-seven billion, four hundred thirty-six million, two hundred fifty-four thousand, five hundred twenty-one".