867864468769 has 2 divisors, whose sum is σ = 867864468770. Its totient is φ = 867864468768.

The previous prime is 867864468767. The next prime is 867864468799. The reversal of 867864468769 is 967864468768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 589191337744 + 278673131025 = 767588^2 + 527895^2 .

It is a cyclic number.

It is not a de Polignac number, because 867864468769 - 2¹ = 867864468767 is a prime.

It is a super-2 number, since 2×867864468769² (a number of 25 digits) contains 22 as substring.

Together with 867864468767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (867864468767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433932234384 + 433932234385.

It is an arithmetic number, because the mean of its divisors is an integer number (433932234385).

Almost surely, 2^867864468769 is an apocalyptic number.

It is an amenable number.

867864468769 is a deficient number, since it is larger than the sum of its proper divisors (1).

867864468769 is an equidigital number, since it uses as much as digits as its factorization.

867864468769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4682022912, while the sum is 79.

Subtracting 867864468769 from its reverse (967864468768), we obtain a palindrome (99999999999).

The spelling of 867864468769 in words is "eight hundred sixty-seven billion, eight hundred sixty-four million, four hundred sixty-eight thousand, seven hundred sixty-nine".