776407306769 has 2 divisors, whose sum is σ = 776407306770. Its totient is φ = 776407306768.

The previous prime is 776407306691. The next prime is 776407306771. The reversal of 776407306769 is 967603704677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463641151744 + 312766155025 = 680912^2 + 559255^2 .

It is a cyclic number.

It is not a de Polignac number, because 776407306769 - 2²⁴ = 776390529553 is a prime.

It is a super-2 number, since 2×776407306769² (a number of 25 digits) contains 22 as substring.

Together with 776407306771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (776407326769) 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, 388203653384 + 388203653385.

It is an arithmetic number, because the mean of its divisors is an integer number (388203653385).

Almost surely, 2^776407306769 is an apocalyptic number.

It is an amenable number.

776407306769 is a deficient number, since it is larger than the sum of its proper divisors (1).

776407306769 is an equidigital number, since it uses as much as digits as its factorization.

776407306769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56010528, while the sum is 62.

The spelling of 776407306769 in words is "seven hundred seventy-six billion, four hundred seven million, three hundred six thousand, seven hundred sixty-nine".