694557642163241 has 2 divisors, whose sum is σ = 694557642163242. Its totient is φ = 694557642163240.

The previous prime is 694557642163213. The next prime is 694557642163261. The reversal of 694557642163241 is 142361246755496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640323843953641 + 54233798209600 = 25304621^2 + 7364360^2 .

It is a cyclic number.

It is not a de Polignac number, because 694557642163241 - 2¹⁴ = 694557642146857 is a prime.

It is not a weakly prime, because it can be changed into another prime (694557642163261) 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, 347278821081620 + 347278821081621.

It is an arithmetic number, because the mean of its divisors is an integer number (347278821081621).

Almost surely, 2^{694557642163241} is an apocalyptic number.

It is an amenable number.

694557642163241 is a deficient number, since it is larger than the sum of its proper divisors (1).

694557642163241 is an equidigital number, since it uses as much as digits as its factorization.

694557642163241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 261273600, while the sum is 65.

The spelling of 694557642163241 in words is "six hundred ninety-four trillion, five hundred fifty-seven billion, six hundred forty-two million, one hundred sixty-three thousand, two hundred forty-one".