80776811 has 2 divisors, whose sum is σ = 80776812. Its totient is φ = 80776810.

The previous prime is 80776799. The next prime is 80776819. The reversal of 80776811 is 11867708.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80776811 - 2¹⁰ = 80775787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80776819) 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, 40388405 + 40388406.

It is an arithmetic number, because the mean of its divisors is an integer number (40388406).

Almost surely, 2^80776811 is an apocalyptic number.

80776811 is a deficient number, since it is larger than the sum of its proper divisors (1).

80776811 is an equidigital number, since it uses as much as digits as its factorization.

80776811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 80776811 is about 8987.5920579430. The cubic root of 80776811 is about 432.2771052354.

The spelling of 80776811 in words is "eighty million, seven hundred seventy-six thousand, eight hundred eleven".