80790678277 has 2 divisors, whose sum is σ = 80790678278. Its totient is φ = 80790678276.

The previous prime is 80790678223. The next prime is 80790678337. The reversal of 80790678277 is 77287609708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65840480836 + 14950197441 = 256594^2 + 122271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80790678277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80790618277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40395339138 + 40395339139.

It is an arithmetic number, because the mean of its divisors is an integer number (40395339139).

Almost surely, 2^80790678277 is an apocalyptic number.

It is an amenable number.

80790678277 is a deficient number, since it is larger than the sum of its proper divisors (1).

80790678277 is an equidigital number, since it uses as much as digits as its factorization.

80790678277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16595712, while the sum is 61.

The spelling of 80790678277 in words is "eighty billion, seven hundred ninety million, six hundred seventy-eight thousand, two hundred seventy-seven".