80941302521 has 2 divisors, whose sum is σ = 80941302522. Its totient is φ = 80941302520.

The previous prime is 80941302443. The next prime is 80941302623. The reversal of 80941302521 is 12520314908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79107750121 + 1833552400 = 281261^2 + 42820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80941302521 is a prime.

It is not a weakly prime, because it can be changed into another prime (80941302721) 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, 40470651260 + 40470651261.

It is an arithmetic number, because the mean of its divisors is an integer number (40470651261).

Almost surely, 2^80941302521 is an apocalyptic number.

It is an amenable number.

80941302521 is a deficient number, since it is larger than the sum of its proper divisors (1).

80941302521 is an equidigital number, since it uses as much as digits as its factorization.

80941302521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 80941302521 in words is "eighty billion, nine hundred forty-one million, three hundred two thousand, five hundred twenty-one".