80897565017 has 2 divisors, whose sum is σ = 80897565018. Its totient is φ = 80897565016.

The previous prime is 80897565011. The next prime is 80897565031. The reversal of 80897565017 is 71056579808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71761837456 + 9135727561 = 267884^2 + 95581^2 .

It is a cyclic number.

It is not a de Polignac number, because 80897565017 - 2⁶ = 80897564953 is a prime.

It is not a weakly prime, because it can be changed into another prime (80897565011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40448782508 + 40448782509.

It is an arithmetic number, because the mean of its divisors is an integer number (40448782509).

Almost surely, 2^80897565017 is an apocalyptic number.

It is an amenable number.

80897565017 is a deficient number, since it is larger than the sum of its proper divisors (1).

80897565017 is an equidigital number, since it uses as much as digits as its factorization.

80897565017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4233600, while the sum is 56.

The spelling of 80897565017 in words is "eighty billion, eight hundred ninety-seven million, five hundred sixty-five thousand, seventeen".