80998659197 has 2 divisors, whose sum is σ = 80998659198. Its totient is φ = 80998659196.

The previous prime is 80998659191. The next prime is 80998659227. The reversal of 80998659197 is 79195689908.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59995113721 + 21003545476 = 244939^2 + 144926^2 .

It is a cyclic number.

It is not a de Polignac number, because 80998659197 - 2¹⁰ = 80998658173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80998659197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80998659191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40499329598 + 40499329599.

It is an arithmetic number, because the mean of its divisors is an integer number (40499329599).

Almost surely, 2^80998659197 is an apocalyptic number.

It is an amenable number.

80998659197 is a deficient number, since it is larger than the sum of its proper divisors (1).

80998659197 is an equidigital number, since it uses as much as digits as its factorization.

80998659197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88179840, while the sum is 71.

The spelling of 80998659197 in words is "eighty billion, nine hundred ninety-eight million, six hundred fifty-nine thousand, one hundred ninety-seven".