168135065702451 has 6 divisors (see below), whose sum is σ = 242861761570220. Its totient is φ = 112090043801628.

The previous prime is 168135065702431. The next prime is 168135065702453. The reversal of 168135065702451 is 154207560531861.

168135065702451 is a `hidden beast` number, since 1 + 6 + 8 + 13 + 5 + 0 + 6 + 570 + 2 + 4 + 51 = 666.

It is not a de Polignac number, because 168135065702451 - 2²⁹ = 168134528831539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168135065702453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9340836983461 + ... + 9340836983478.

Almost surely, 2^{168135065702451} is an apocalyptic number.

168135065702451 is a deficient number, since it is larger than the sum of its proper divisors (74726695867769).

168135065702451 is a wasteful number, since it uses less digits than its factorization.

168135065702451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18681673966945 (or 18681673966942 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 168135065702451 in words is "one hundred sixty-eight trillion, one hundred thirty-five billion, sixty-five million, seven hundred two thousand, four hundred fifty-one".