2691116916533 has 2 divisors, whose sum is σ = 2691116916534. Its totient is φ = 2691116916532.

The previous prime is 2691116916473. The next prime is 2691116916539. The reversal of 2691116916533 is 3356196111962.

2691116916533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2689413043249 + 1703873284 = 1639943^2 + 41278^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691116916533 - 2⁶ = 2691116916469 is a prime.

It is a super-2 number, since 2×2691116916533² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2691116916539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345558458266 + 1345558458267.

It is an arithmetic number, because the mean of its divisors is an integer number (1345558458267).

Almost surely, 2^{2691116916533} is an apocalyptic number.

It is an amenable number.

2691116916533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691116916533 is an equidigital number, since it uses as much as digits as its factorization.

2691116916533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1574640, while the sum is 53.

The spelling of 2691116916533 in words is "two trillion, six hundred ninety-one billion, one hundred sixteen million, nine hundred sixteen thousand, five hundred thirty-three".