76865656139 has 2 divisors, whose sum is σ = 76865656140. Its totient is φ = 76865656138.

The previous prime is 76865656121. The next prime is 76865656151. The reversal of 76865656139 is 93165656867.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76865656139 - 2¹² = 76865652043 is a prime.

It is not a weakly prime, because it can be changed into another prime (76865656939) 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, 38432828069 + 38432828070.

It is an arithmetic number, because the mean of its divisors is an integer number (38432828070).

Almost surely, 2^76865656139 is an apocalyptic number.

76865656139 is a deficient number, since it is larger than the sum of its proper divisors (1).

76865656139 is an equidigital number, since it uses as much as digits as its factorization.

76865656139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48988800, while the sum is 62.

The spelling of 76865656139 in words is "seventy-six billion, eight hundred sixty-five million, six hundred fifty-six thousand, one hundred thirty-nine".