8180458176721 has 2 divisors, whose sum is σ = 8180458176722. Its totient is φ = 8180458176720.

The previous prime is 8180458176719. The next prime is 8180458176731. The reversal of 8180458176721 is 1276718540818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8151025000000 + 29433176721 = 2855000^2 + 171561^2 .

It is a cyclic number.

It is not a de Polignac number, because 8180458176721 - 2¹ = 8180458176719 is a prime.

Together with 8180458176719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8180458176731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4090229088360 + 4090229088361.

It is an arithmetic number, because the mean of its divisors is an integer number (4090229088361).

Almost surely, 2^{8180458176721} is an apocalyptic number.

It is an amenable number.

8180458176721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8180458176721 is an equidigital number, since it uses as much as digits as its factorization.

8180458176721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6021120, while the sum is 58.

The spelling of 8180458176721 in words is "eight trillion, one hundred eighty billion, four hundred fifty-eight million, one hundred seventy-six thousand, seven hundred twenty-one".