108680637817 has 2 divisors, whose sum is σ = 108680637818. Its totient is φ = 108680637816.

The previous prime is 108680637803. The next prime is 108680637823. The reversal of 108680637817 is 718736086801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83176867216 + 25503770601 = 288404^2 + 159699^2 .

It is a cyclic number.

It is not a de Polignac number, because 108680637817 - 2²³ = 108672249209 is a prime.

It is a super-2 number, since 2×108680637817² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (108680637847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54340318908 + 54340318909.

It is an arithmetic number, because the mean of its divisors is an integer number (54340318909).

Almost surely, 2^108680637817 is an apocalyptic number.

It is an amenable number.

108680637817 is a deficient number, since it is larger than the sum of its proper divisors (1).

108680637817 is an equidigital number, since it uses as much as digits as its factorization.

108680637817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 108680637817 in words is "one hundred eight billion, six hundred eighty million, six hundred thirty-seven thousand, eight hundred seventeen".