80908061917 has 2 divisors, whose sum is σ = 80908061918. Its totient is φ = 80908061916.

The previous prime is 80908061867. The next prime is 80908061939. The reversal of 80908061917 is 71916080908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51813595876 + 29094466041 = 227626^2 + 170571^2 .

It is a cyclic number.

It is not a de Polignac number, because 80908061917 - 2¹⁵ = 80908029149 is a prime.

It is a super-2 number, since 2×80908061917² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80908061317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40454030958 + 40454030959.

It is an arithmetic number, because the mean of its divisors is an integer number (40454030959).

Almost surely, 2^80908061917 is an apocalyptic number.

It is an amenable number.

80908061917 is a deficient number, since it is larger than the sum of its proper divisors (1).

80908061917 is an equidigital number, since it uses as much as digits as its factorization.

80908061917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 49.

The spelling of 80908061917 in words is "eighty billion, nine hundred eight million, sixty-one thousand, nine hundred seventeen".