1068764632781 has 2 divisors, whose sum is σ = 1068764632782. Its totient is φ = 1068764632780.

The previous prime is 1068764632709. The next prime is 1068764632801. The reversal of 1068764632781 is 1872364678601.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 859961330281 + 208803302500 = 927341^2 + 456950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1068764632781 - 2¹⁸ = 1068764370637 is a prime.

It is a super-2 number, since 2×1068764632781² (a number of 25 digits) contains 22 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 1068764632781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1068764637781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534382316390 + 534382316391.

It is an arithmetic number, because the mean of its divisors is an integer number (534382316391).

Almost surely, 2^{1068764632781} is an apocalyptic number.

It is an amenable number.

1068764632781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1068764632781 is an equidigital number, since it uses as much as digits as its factorization.

1068764632781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 1068764632781 in words is "one trillion, sixty-eight billion, seven hundred sixty-four million, six hundred thirty-two thousand, seven hundred eighty-one".