80738756669 has 2 divisors, whose sum is σ = 80738756670. Its totient is φ = 80738756668.

The previous prime is 80738756641. The next prime is 80738756671. The reversal of 80738756669 is 96665783708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78953694169 + 1785062500 = 280987^2 + 42250^2 .

It is a cyclic number.

It is not a de Polignac number, because 80738756669 - 2¹² = 80738752573 is a prime.

It is a super-2 number, since 2×80738756669² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 80738756671, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80738756639) 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, 40369378334 + 40369378335.

It is an arithmetic number, because the mean of its divisors is an integer number (40369378335).

Almost surely, 2^80738756669 is an apocalyptic number.

It is an amenable number.

80738756669 is a deficient number, since it is larger than the sum of its proper divisors (1).

80738756669 is an equidigital number, since it uses as much as digits as its factorization.

80738756669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91445760, while the sum is 65.

The spelling of 80738756669 in words is "eighty billion, seven hundred thirty-eight million, seven hundred fifty-six thousand, six hundred sixty-nine".