688161982337 has 2 divisors, whose sum is σ = 688161982338. Its totient is φ = 688161982336.

The previous prime is 688161982289. The next prime is 688161982363. The reversal of 688161982337 is 733289161886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 626616311281 + 61545671056 = 791591^2 + 248084^2 .

It is a cyclic number.

It is not a de Polignac number, because 688161982337 - 2¹² = 688161978241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688161982337.

It is not a weakly prime, because it can be changed into another prime (688161982397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344080991168 + 344080991169.

It is an arithmetic number, because the mean of its divisors is an integer number (344080991169).

Almost surely, 2^688161982337 is an apocalyptic number.

It is an amenable number.

688161982337 is a deficient number, since it is larger than the sum of its proper divisors (1).

688161982337 is an equidigital number, since it uses as much as digits as its factorization.

688161982337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 62.

The spelling of 688161982337 in words is "six hundred eighty-eight billion, one hundred sixty-one million, nine hundred eighty-two thousand, three hundred thirty-seven".