80428572509 has 2 divisors, whose sum is σ = 80428572510. Its totient is φ = 80428572508.

The previous prime is 80428572493. The next prime is 80428572571. The reversal of 80428572509 is 90527582408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70236660484 + 10191912025 = 265022^2 + 100955^2 .

It is a cyclic number.

It is not a de Polignac number, because 80428572509 - 2⁴ = 80428572493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80428572599) 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, 40214286254 + 40214286255.

It is an arithmetic number, because the mean of its divisors is an integer number (40214286255).

Almost surely, 2^80428572509 is an apocalyptic number.

It is an amenable number.

80428572509 is a deficient number, since it is larger than the sum of its proper divisors (1).

80428572509 is an equidigital number, since it uses as much as digits as its factorization.

80428572509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 80428572509 in words is "eighty billion, four hundred twenty-eight million, five hundred seventy-two thousand, five hundred nine".