80968663949 has 2 divisors, whose sum is σ = 80968663950. Its totient is φ = 80968663948.

The previous prime is 80968663943. The next prime is 80968663981. The reversal of 80968663949 is 94936686908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42388633225 + 38580030724 = 205885^2 + 196418^2 .

It is a cyclic number.

It is not a de Polignac number, because 80968663949 - 2³² = 76673696653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80968663943) 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, 40484331974 + 40484331975.

It is an arithmetic number, because the mean of its divisors is an integer number (40484331975).

Almost surely, 2^80968663949 is an apocalyptic number.

It is an amenable number.

80968663949 is a deficient number, since it is larger than the sum of its proper divisors (1).

80968663949 is an equidigital number, since it uses as much as digits as its factorization.

80968663949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120932352, while the sum is 68.

The spelling of 80968663949 in words is "eighty billion, nine hundred sixty-eight million, six hundred sixty-three thousand, nine hundred forty-nine".