80983499809 has 2 divisors, whose sum is σ = 80983499810. Its totient is φ = 80983499808.

The previous prime is 80983499749. The next prime is 80983499819. The reversal of 80983499809 is 90899438908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78949760400 + 2033739409 = 280980^2 + 45097^2 .

It is a cyclic number.

It is not a de Polignac number, because 80983499809 - 2¹¹ = 80983497761 is a prime.

It is not a weakly prime, because it can be changed into another prime (80983499819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40491749904 + 40491749905.

It is an arithmetic number, because the mean of its divisors is an integer number (40491749905).

Almost surely, 2^80983499809 is an apocalyptic number.

It is an amenable number.

80983499809 is a deficient number, since it is larger than the sum of its proper divisors (1).

80983499809 is an equidigital number, since it uses as much as digits as its factorization.

80983499809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40310784, while the sum is 67.

The spelling of 80983499809 in words is "eighty billion, nine hundred eighty-three million, four hundred ninety-nine thousand, eight hundred nine".