263776513249 has 2 divisors, whose sum is σ = 263776513250. Its totient is φ = 263776513248.

The previous prime is 263776513241. The next prime is 263776513291. The reversal of 263776513249 is 942315677362.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139731673249 + 124044840000 = 373807^2 + 352200^2 .

It is a cyclic number.

It is not a de Polignac number, because 263776513249 - 2³ = 263776513241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263776513249.

It is not a weakly prime, because it can be changed into another prime (263776513241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131888256624 + 131888256625.

It is an arithmetic number, because the mean of its divisors is an integer number (131888256625).

Almost surely, 2^263776513249 is an apocalyptic number.

It is an amenable number.

263776513249 is a deficient number, since it is larger than the sum of its proper divisors (1).

263776513249 is an equidigital number, since it uses as much as digits as its factorization.

263776513249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 55.

The spelling of 263776513249 in words is "two hundred sixty-three billion, seven hundred seventy-six million, five hundred thirteen thousand, two hundred forty-nine".