80663036557 has 2 divisors, whose sum is σ = 80663036558. Its totient is φ = 80663036556.

The previous prime is 80663036537. The next prime is 80663036567. The reversal of 80663036557 is 75563036608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64539370116 + 16123666441 = 254046^2 + 126979^2 .

It is a cyclic number.

It is not a de Polignac number, because 80663036557 - 2¹¹ = 80663034509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80663036557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80663036537) 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, 40331518278 + 40331518279.

It is an arithmetic number, because the mean of its divisors is an integer number (40331518279).

Almost surely, 2^80663036557 is an apocalyptic number.

It is an amenable number.

80663036557 is a deficient number, since it is larger than the sum of its proper divisors (1).

80663036557 is an equidigital number, since it uses as much as digits as its factorization.

80663036557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 80663036557 in words is "eighty billion, six hundred sixty-three million, thirty-six thousand, five hundred fifty-seven".