263116409993 has 2 divisors, whose sum is σ = 263116409994. Its totient is φ = 263116409992.

The previous prime is 263116409989. The next prime is 263116410047. The reversal of 263116409993 is 399904611362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190455433744 + 72660976249 = 436412^2 + 269557^2 .

It is a cyclic number.

It is not a de Polignac number, because 263116409993 - 2² = 263116409989 is a prime.

It is not a weakly prime, because it can be changed into another prime (263116409693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131558204996 + 131558204997.

It is an arithmetic number, because the mean of its divisors is an integer number (131558204997).

Almost surely, 2^263116409993 is an apocalyptic number.

It is an amenable number.

263116409993 is a deficient number, since it is larger than the sum of its proper divisors (1).

263116409993 is an equidigital number, since it uses as much as digits as its factorization.

263116409993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 53.

The spelling of 263116409993 in words is "two hundred sixty-three billion, one hundred sixteen million, four hundred nine thousand, nine hundred ninety-three".