12826920766537 has 2 divisors, whose sum is σ = 12826920766538. Its totient is φ = 12826920766536.

The previous prime is 12826920766523. The next prime is 12826920766579. The reversal of 12826920766537 is 73566702962821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9522291244041 + 3304629522496 = 3085821^2 + 1817864^2 .

It is a cyclic number.

It is not a de Polignac number, because 12826920766537 - 2²⁷ = 12826786548809 is a prime.

It is not a weakly prime, because it can be changed into another prime (12826920766237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6413460383268 + 6413460383269.

It is an arithmetic number, because the mean of its divisors is an integer number (6413460383269).

Almost surely, 2^{12826920766537} is an apocalyptic number.

It is an amenable number.

12826920766537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12826920766537 is an equidigital number, since it uses as much as digits as its factorization.

12826920766537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91445760, while the sum is 64.

The spelling of 12826920766537 in words is "twelve trillion, eight hundred twenty-six billion, nine hundred twenty million, seven hundred sixty-six thousand, five hundred thirty-seven".