688358085161 has 2 divisors, whose sum is σ = 688358085162. Its totient is φ = 688358085160.

The previous prime is 688358085059. The next prime is 688358085167. The reversal of 688358085161 is 161580853886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 676341760000 + 12016325161 = 822400^2 + 109619^2 .

It is a cyclic number.

It is not a de Polignac number, because 688358085161 - 2¹⁰ = 688358084137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688358085161.

It is not a weakly prime, because it can be changed into another prime (688358085167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344179042580 + 344179042581.

It is an arithmetic number, because the mean of its divisors is an integer number (344179042581).

Almost surely, 2^688358085161 is an apocalyptic number.

It is an amenable number.

688358085161 is a deficient number, since it is larger than the sum of its proper divisors (1).

688358085161 is an equidigital number, since it uses as much as digits as its factorization.

688358085161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11059200, while the sum is 59.

The spelling of 688358085161 in words is "six hundred eighty-eight billion, three hundred fifty-eight million, eighty-five thousand, one hundred sixty-one".