168640057759 has 2 divisors, whose sum is σ = 168640057760. Its totient is φ = 168640057758.

The previous prime is 168640057727. The next prime is 168640057769. The reversal of 168640057759 is 957750046861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168640057759 - 2⁵ = 168640057727 is a prime.

It is a super-2 number, since 2×168640057759² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168640057769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84320028879 + 84320028880.

It is an arithmetic number, because the mean of its divisors is an integer number (84320028880).

Almost surely, 2^168640057759 is an apocalyptic number.

168640057759 is a deficient number, since it is larger than the sum of its proper divisors (1).

168640057759 is an equidigital number, since it uses as much as digits as its factorization.

168640057759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 168640057759 in words is "one hundred sixty-eight billion, six hundred forty million, fifty-seven thousand, seven hundred fifty-nine".