263632956289 has 2 divisors, whose sum is σ = 263632956290. Its totient is φ = 263632956288.

The previous prime is 263632956233. The next prime is 263632956317. The reversal of 263632956289 is 982659236362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222420708225 + 41212248064 = 471615^2 + 203008^2 .

It is a cyclic number.

It is not a de Polignac number, because 263632956289 - 2²⁹ = 263096085377 is a prime.

It is not a weakly prime, because it can be changed into another prime (263632956589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131816478144 + 131816478145.

It is an arithmetic number, because the mean of its divisors is an integer number (131816478145).

Almost surely, 2^263632956289 is an apocalyptic number.

It is an amenable number.

263632956289 is a deficient number, since it is larger than the sum of its proper divisors (1).

263632956289 is an equidigital number, since it uses as much as digits as its factorization.

263632956289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50388480, while the sum is 61.

The spelling of 263632956289 in words is "two hundred sixty-three billion, six hundred thirty-two million, nine hundred fifty-six thousand, two hundred eighty-nine".