168806497357 has 2 divisors, whose sum is σ = 168806497358. Its totient is φ = 168806497356.

The previous prime is 168806497297. The next prime is 168806497403. The reversal of 168806497357 is 753794608861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90171681796 + 78634815561 = 300286^2 + 280419^2 .

It is a cyclic number.

It is not a de Polignac number, because 168806497357 - 2¹⁹ = 168805973069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168806497757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84403248678 + 84403248679.

It is an arithmetic number, because the mean of its divisors is an integer number (84403248679).

Almost surely, 2^168806497357 is an apocalyptic number.

It is an amenable number.

168806497357 is a deficient number, since it is larger than the sum of its proper divisors (1).

168806497357 is an equidigital number, since it uses as much as digits as its factorization.

168806497357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 168806497357 in words is "one hundred sixty-eight billion, eight hundred six million, four hundred ninety-seven thousand, three hundred fifty-seven".