263701616461 has 2 divisors, whose sum is σ = 263701616462. Its totient is φ = 263701616460.

The previous prime is 263701616369. The next prime is 263701616501. The reversal of 263701616461 is 164616107362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153656160100 + 110045456361 = 391990^2 + 331731^2 .

It is a cyclic number.

It is not a de Polignac number, because 263701616461 - 2¹⁷ = 263701485389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263701616861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131850808230 + 131850808231.

It is an arithmetic number, because the mean of its divisors is an integer number (131850808231).

Almost surely, 2^263701616461 is an apocalyptic number.

It is an amenable number.

263701616461 is a deficient number, since it is larger than the sum of its proper divisors (1).

263701616461 is an equidigital number, since it uses as much as digits as its factorization.

263701616461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 263701616461 in words is "two hundred sixty-three billion, seven hundred one million, six hundred sixteen thousand, four hundred sixty-one".