1316263144657 has 2 divisors, whose sum is σ = 1316263144658. Its totient is φ = 1316263144656.

The previous prime is 1316263144649. The next prime is 1316263144687. The reversal of 1316263144657 is 7564413626131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1162480737856 + 153782406801 = 1078184^2 + 392151^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316263144657 - 2³ = 1316263144649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1316263144657.

It is not a weakly prime, because it can be changed into another prime (1316263144687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658131572328 + 658131572329.

It is an arithmetic number, because the mean of its divisors is an integer number (658131572329).

Almost surely, 2^{1316263144657} is an apocalyptic number.

It is an amenable number.

1316263144657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316263144657 is an equidigital number, since it uses as much as digits as its factorization.

1316263144657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 49.

The spelling of 1316263144657 in words is "one trillion, three hundred sixteen billion, two hundred sixty-three million, one hundred forty-four thousand, six hundred fifty-seven".