1291675828361 has 2 divisors, whose sum is σ = 1291675828362. Its totient is φ = 1291675828360.

The previous prime is 1291675828357. The next prime is 1291675828367. The reversal of 1291675828361 is 1638285761921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1127504185600 + 164171642761 = 1061840^2 + 405181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1291675828361 - 2² = 1291675828357 is a prime.

It is a super-3 number, since 3×1291675828361³ (a number of 37 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1291675828361.

It is not a weakly prime, because it can be changed into another prime (1291675828367) 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, 645837914180 + 645837914181.

It is an arithmetic number, because the mean of its divisors is an integer number (645837914181).

Almost surely, 2^{1291675828361} is an apocalyptic number.

It is an amenable number.

1291675828361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291675828361 is an equidigital number, since it uses as much as digits as its factorization.

1291675828361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 59.

The spelling of 1291675828361 in words is "one trillion, two hundred ninety-one billion, six hundred seventy-five million, eight hundred twenty-eight thousand, three hundred sixty-one".