688544717171 has 2 divisors, whose sum is σ = 688544717172. Its totient is φ = 688544717170.

The previous prime is 688544717167. The next prime is 688544717183. The reversal of 688544717171 is 171717445886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688544717171 - 2² = 688544717167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688544717171.

It is not a weakly prime, because it can be changed into another prime (688544717101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344272358585 + 344272358586.

It is an arithmetic number, because the mean of its divisors is an integer number (344272358586).

Almost surely, 2^688544717171 is an apocalyptic number.

688544717171 is a deficient number, since it is larger than the sum of its proper divisors (1).

688544717171 is an equidigital number, since it uses as much as digits as its factorization.

688544717171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10536960, while the sum is 59.

The spelling of 688544717171 in words is "six hundred eighty-eight billion, five hundred forty-four million, seven hundred seventeen thousand, one hundred seventy-one".