263561017229 has 2 divisors, whose sum is σ = 263561017230. Its totient is φ = 263561017228.

The previous prime is 263561017219. The next prime is 263561017259. The reversal of 263561017229 is 922710165362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176821932004 + 86739085225 = 420502^2 + 294515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263561017229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263561017229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263561017219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131780508614 + 131780508615.

It is an arithmetic number, because the mean of its divisors is an integer number (131780508615).

Almost surely, 2^263561017229 is an apocalyptic number.

It is an amenable number.

263561017229 is a deficient number, since it is larger than the sum of its proper divisors (1).

263561017229 is an equidigital number, since it uses as much as digits as its factorization.

263561017229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 263561017229 in words is "two hundred sixty-three billion, five hundred sixty-one million, seventeen thousand, two hundred twenty-nine".