80012499989 has 2 divisors, whose sum is σ = 80012499990. Its totient is φ = 80012499988.

The previous prime is 80012499961. The next prime is 80012500003. The reversal of 80012499989 is 98999421008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73796439025 + 6216060964 = 271655^2 + 78842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80012499989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80012499929) 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, 40006249994 + 40006249995.

It is an arithmetic number, because the mean of its divisors is an integer number (40006249995).

Almost surely, 2^80012499989 is an apocalyptic number.

It is an amenable number.

80012499989 is a deficient number, since it is larger than the sum of its proper divisors (1).

80012499989 is an equidigital number, since it uses as much as digits as its factorization.

80012499989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 59.

The spelling of 80012499989 in words is "eighty billion, twelve million, four hundred ninety-nine thousand, nine hundred eighty-nine".