76865656849 has 2 divisors, whose sum is σ = 76865656850. Its totient is φ = 76865656848.

The previous prime is 76865656841. The next prime is 76865656867. The reversal of 76865656849 is 94865656867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45821683600 + 31043973249 = 214060^2 + 176193^2 .

It is a cyclic number.

It is not a de Polignac number, because 76865656849 - 2³ = 76865656841 is a prime.

It is not a weakly prime, because it can be changed into another prime (76865656841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38432828424 + 38432828425.

It is an arithmetic number, because the mean of its divisors is an integer number (38432828425).

Almost surely, 2^76865656849 is an apocalyptic number.

It is an amenable number.

76865656849 is a deficient number, since it is larger than the sum of its proper divisors (1).

76865656849 is an equidigital number, since it uses as much as digits as its factorization.

76865656849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 522547200, while the sum is 70.

The spelling of 76865656849 in words is "seventy-six billion, eight hundred sixty-five million, six hundred fifty-six thousand, eight hundred forty-nine".