80145664849 has 2 divisors, whose sum is σ = 80145664850. Its totient is φ = 80145664848.

The previous prime is 80145664763. The next prime is 80145664867. The reversal of 80145664849 is 94846654108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64144679824 + 16000985025 = 253268^2 + 126495^2 .

It is a cyclic number.

It is not a de Polignac number, because 80145664849 - 2¹⁷ = 80145533777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80145664849.

It is not a weakly prime, because it can be changed into another prime (80145064849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40072832424 + 40072832425.

It is an arithmetic number, because the mean of its divisors is an integer number (40072832425).

Almost surely, 2^80145664849 is an apocalyptic number.

It is an amenable number.

80145664849 is a deficient number, since it is larger than the sum of its proper divisors (1).

80145664849 is an equidigital number, since it uses as much as digits as its factorization.

80145664849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 80145664849 in words is "eighty billion, one hundred forty-five million, six hundred sixty-four thousand, eight hundred forty-nine".