77825532877 has 2 divisors, whose sum is σ = 77825532878. Its totient is φ = 77825532876.

The previous prime is 77825532809. The next prime is 77825532923. The reversal of 77825532877 is 77823552877.

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., 58109441481 + 19716091396 = 241059^2 + 140414^2 .

It is a cyclic number.

It is not a de Polignac number, because 77825532877 - 2³¹ = 75678049229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77825532077) 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, 38912766438 + 38912766439.

It is an arithmetic number, because the mean of its divisors is an integer number (38912766439).

Almost surely, 2^77825532877 is an apocalyptic number.

It is an amenable number.

77825532877 is a deficient number, since it is larger than the sum of its proper divisors (1).

77825532877 is an equidigital number, since it uses as much as digits as its factorization.

77825532877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46099200, while the sum is 61.

The spelling of 77825532877 in words is "seventy-seven billion, eight hundred twenty-five million, five hundred thirty-two thousand, eight hundred seventy-seven".