80203025857 has 2 divisors, whose sum is σ = 80203025858. Its totient is φ = 80203025856.

The previous prime is 80203025843. The next prime is 80203025869. The reversal of 80203025857 is 75852030208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65872302336 + 14330723521 = 256656^2 + 119711^2 .

It is a cyclic number.

It is not a de Polignac number, because 80203025857 - 2¹⁹ = 80202501569 is a prime.

It is a super-2 number, since 2×80203025857² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80203025887) 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, 40101512928 + 40101512929.

It is an arithmetic number, because the mean of its divisors is an integer number (40101512929).

Almost surely, 2^80203025857 is an apocalyptic number.

It is an amenable number.

80203025857 is a deficient number, since it is larger than the sum of its proper divisors (1).

80203025857 is an equidigital number, since it uses as much as digits as its factorization.

80203025857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 80203025857 in words is "eighty billion, two hundred three million, twenty-five thousand, eight hundred fifty-seven".