728080079977 has 2 divisors, whose sum is σ = 728080079978. Its totient is φ = 728080079976.

The previous prime is 728080079941. The next prime is 728080080011. The reversal of 728080079977 is 779970080827.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 459228496896 + 268851583081 = 677664^2 + 518509^2 .

It is a cyclic number.

It is not a de Polignac number, because 728080079977 - 2¹¹ = 728080077929 is a prime.

It is not a weakly prime, because it can be changed into another prime (728080079917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364040039988 + 364040039989.

It is an arithmetic number, because the mean of its divisors is an integer number (364040039989).

Almost surely, 2^728080079977 is an apocalyptic number.

It is an amenable number.

728080079977 is a deficient number, since it is larger than the sum of its proper divisors (1).

728080079977 is an equidigital number, since it uses as much as digits as its factorization.

728080079977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24893568, while the sum is 64.

The spelling of 728080079977 in words is "seven hundred twenty-eight billion, eighty million, seventy-nine thousand, nine hundred seventy-seven".