80111777 has 2 divisors, whose sum is σ = 80111778. Its totient is φ = 80111776.

The previous prime is 80111753. The next prime is 80111789. The reversal of 80111777 is 77711108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41783296 + 38328481 = 6464^2 + 6191^2 .

It is a cyclic number.

It is not a de Polignac number, because 80111777 - 2²² = 75917473 is a prime.

It is not a weakly prime, because it can be changed into another prime (80111747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40055888 + 40055889.

It is an arithmetic number, because the mean of its divisors is an integer number (40055889).

Almost surely, 2^80111777 is an apocalyptic number.

It is an amenable number.

80111777 is a deficient number, since it is larger than the sum of its proper divisors (1).

80111777 is an equidigital number, since it uses as much as digits as its factorization.

80111777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2744, while the sum is 32.

The square root of 80111777 is about 8950.5182531516. The cubic root of 80111777 is about 431.0875248199.

The spelling of 80111777 in words is "eighty million, one hundred eleven thousand, seven hundred seventy-seven".