860778067769 has 2 divisors, whose sum is σ = 860778067770. Its totient is φ = 860778067768.

The previous prime is 860778067727. The next prime is 860778067783. The reversal of 860778067769 is 967760877068.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 728709786025 + 132068281744 = 853645^2 + 363412^2 .

It is a cyclic number.

It is not a de Polignac number, because 860778067769 - 2²⁸ = 860509632313 is a prime.

It is a super-2 number, since 2×860778067769² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (860778367769) 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, 430389033884 + 430389033885.

It is an arithmetic number, because the mean of its divisors is an integer number (430389033885).

Almost surely, 2^860778067769 is an apocalyptic number.

It is an amenable number.

860778067769 is a deficient number, since it is larger than the sum of its proper divisors (1).

860778067769 is an equidigital number, since it uses as much as digits as its factorization.

860778067769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 298722816, while the sum is 71.

The spelling of 860778067769 in words is "eight hundred sixty billion, seven hundred seventy-eight million, sixty-seven thousand, seven hundred sixty-nine".