1071707799781 has 2 divisors, whose sum is σ = 1071707799782. Its totient is φ = 1071707799780.

The previous prime is 1071707799769. The next prime is 1071707799823. The reversal of 1071707799781 is 1879977071701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745055543556 + 326652256225 = 863166^2 + 571535^2 .

It is an emirp because it is prime and its reverse (1879977071701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1071707799781 - 2¹⁷ = 1071707668709 is a prime.

It is a super-2 number, since 2×1071707799781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1071707799731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535853899890 + 535853899891.

It is an arithmetic number, because the mean of its divisors is an integer number (535853899891).

Almost surely, 2^{1071707799781} is an apocalyptic number.

It is an amenable number.

1071707799781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071707799781 is an equidigital number, since it uses as much as digits as its factorization.

1071707799781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10890936, while the sum is 64.

The spelling of 1071707799781 in words is "one trillion, seventy-one billion, seven hundred seven million, seven hundred ninety-nine thousand, seven hundred eighty-one".