80640011 has 2 divisors, whose sum is σ = 80640012. Its totient is φ = 80640010.

The previous prime is 80639969. The next prime is 80640023. The reversal of 80640011 is 11004608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80640011 - 2⁶ = 80639947 is a prime.

It is a super-2 number, since 2×80640011² = 13005622748160242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80640031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40320005 + 40320006.

It is an arithmetic number, because the mean of its divisors is an integer number (40320006).

Almost surely, 2^80640011 is an apocalyptic number.

80640011 is a deficient number, since it is larger than the sum of its proper divisors (1).

80640011 is an equidigital number, since it uses as much as digits as its factorization.

80640011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 80640011 is about 8979.9783407311. The cubic root of 80640011 is about 432.0329389465.

Adding to 80640011 its reverse (11004608), we get a palindrome (91644619).

The spelling of 80640011 in words is "eighty million, six hundred forty thousand, eleven".