168635769157 has 2 divisors, whose sum is σ = 168635769158. Its totient is φ = 168635769156.

The previous prime is 168635769101. The next prime is 168635769163. The reversal of 168635769157 is 751967536861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136154358081 + 32481411076 = 368991^2 + 180226^2 .

It is a cyclic number.

It is not a de Polignac number, because 168635769157 - 2¹¹ = 168635767109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168635769857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84317884578 + 84317884579.

It is an arithmetic number, because the mean of its divisors is an integer number (84317884579).

Almost surely, 2^168635769157 is an apocalyptic number.

It is an amenable number.

168635769157 is a deficient number, since it is larger than the sum of its proper divisors (1).

168635769157 is an equidigital number, since it uses as much as digits as its factorization.

168635769157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57153600, while the sum is 64.

The spelling of 168635769157 in words is "one hundred sixty-eight billion, six hundred thirty-five million, seven hundred sixty-nine thousand, one hundred fifty-seven".