263773779349 has 2 divisors, whose sum is σ = 263773779350. Its totient is φ = 263773779348.

The previous prime is 263773779343. The next prime is 263773779461. The reversal of 263773779349 is 943977377362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181092802500 + 82680976849 = 425550^2 + 287543^2 .

It is a cyclic number.

It is not a de Polignac number, because 263773779349 - 2¹¹ = 263773777301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263773779343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131886889674 + 131886889675.

It is an arithmetic number, because the mean of its divisors is an integer number (131886889675).

Almost surely, 2^263773779349 is an apocalyptic number.

It is an amenable number.

263773779349 is a deficient number, since it is larger than the sum of its proper divisors (1).

263773779349 is an equidigital number, since it uses as much as digits as its factorization.

263773779349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252047376, while the sum is 67.

The spelling of 263773779349 in words is "two hundred sixty-three billion, seven hundred seventy-three million, seven hundred seventy-nine thousand, three hundred forty-nine".