77676882197 has 2 divisors, whose sum is σ = 77676882198. Its totient is φ = 77676882196.

The previous prime is 77676882139. The next prime is 77676882253. The reversal of 77676882197 is 79128867677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67140064996 + 10536817201 = 259114^2 + 102649^2 .

It is a cyclic number.

It is not a de Polignac number, because 77676882197 - 2⁸ = 77676881941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77676881197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38838441098 + 38838441099.

It is an arithmetic number, because the mean of its divisors is an integer number (38838441099).

Almost surely, 2^77676882197 is an apocalyptic number.

It is an amenable number.

77676882197 is a deficient number, since it is larger than the sum of its proper divisors (1).

77676882197 is an equidigital number, since it uses as much as digits as its factorization.

77676882197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 99574272, while the sum is 68.

The spelling of 77676882197 in words is "seventy-seven billion, six hundred seventy-six million, eight hundred eighty-two thousand, one hundred ninety-seven".