1263263319401 has 2 divisors, whose sum is σ = 1263263319402. Its totient is φ = 1263263319400.

The previous prime is 1263263319397. The next prime is 1263263319457. The reversal of 1263263319401 is 1049133623621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825481273600 + 437782045801 = 908560^2 + 661651^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263263319401 - 2² = 1263263319397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1263263319481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631631659700 + 631631659701.

It is an arithmetic number, because the mean of its divisors is an integer number (631631659701).

Almost surely, 2^{1263263319401} is an apocalyptic number.

It is an amenable number.

1263263319401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263263319401 is an equidigital number, since it uses as much as digits as its factorization.

1263263319401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 41.

The spelling of 1263263319401 in words is "one trillion, two hundred sixty-three billion, two hundred sixty-three million, three hundred nineteen thousand, four hundred one".