263641602241 has 2 divisors, whose sum is σ = 263641602242. Its totient is φ = 263641602240.

The previous prime is 263641602173. The next prime is 263641602251. The reversal of 263641602241 is 142206146362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257129112241 + 6512490000 = 507079^2 + 80700^2 .

It is a cyclic number.

It is not a de Polignac number, because 263641602241 - 2⁷ = 263641602113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263641602241.

It is not a weakly prime, because it can be changed into another prime (263641602251) 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, 131820801120 + 131820801121.

It is an arithmetic number, because the mean of its divisors is an integer number (131820801121).

Almost surely, 2^263641602241 is an apocalyptic number.

It is an amenable number.

263641602241 is a deficient number, since it is larger than the sum of its proper divisors (1).

263641602241 is an equidigital number, since it uses as much as digits as its factorization.

263641602241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 263641602241 in words is "two hundred sixty-three billion, six hundred forty-one million, six hundred two thousand, two hundred forty-one".