263104427553509 has 2 divisors, whose sum is σ = 263104427553510. Its totient is φ = 263104427553508.

The previous prime is 263104427553449. The next prime is 263104427553511. The reversal of 263104427553509 is 905355724401362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216951630401284 + 46152797152225 = 14729278^2 + 6793585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263104427553509 is a prime.

Together with 263104427553511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263104427550509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131552213776754 + 131552213776755.

It is an arithmetic number, because the mean of its divisors is an integer number (131552213776755).

Almost surely, 2^{263104427553509} is an apocalyptic number.

It is an amenable number.

263104427553509 is a deficient number, since it is larger than the sum of its proper divisors (1).

263104427553509 is an equidigital number, since it uses as much as digits as its factorization.

263104427553509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216000, while the sum is 56.

The spelling of 263104427553509 in words is "two hundred sixty-three trillion, one hundred four billion, four hundred twenty-seven million, five hundred fifty-three thousand, five hundred nine".