1316206565533 has 2 divisors, whose sum is σ = 1316206565534. Its totient is φ = 1316206565532.

The previous prime is 1316206565413. The next prime is 1316206565549. The reversal of 1316206565533 is 3355656026131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 852449651524 + 463756914009 = 923282^2 + 680997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1316206565533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1316206565633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658103282766 + 658103282767.

It is an arithmetic number, because the mean of its divisors is an integer number (658103282767).

Almost surely, 2^{1316206565533} is an apocalyptic number.

It is an amenable number.

1316206565533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316206565533 is an equidigital number, since it uses as much as digits as its factorization.

1316206565533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 46.

The spelling of 1316206565533 in words is "one trillion, three hundred sixteen billion, two hundred six million, five hundred sixty-five thousand, five hundred thirty-three".