168135065702431 has 2 divisors, whose sum is σ = 168135065702432. Its totient is φ = 168135065702430.

The previous prime is 168135065702423. The next prime is 168135065702453. The reversal of 168135065702431 is 134207560531861.

It is a weak prime.

It is an emirp because it is prime and its reverse (134207560531861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168135065702431 - 2³ = 168135065702423 is a prime.

It is a super-2 number, since 2×168135065702431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168135065742431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84067532851215 + 84067532851216.

It is an arithmetic number, because the mean of its divisors is an integer number (84067532851216).

Almost surely, 2^{168135065702431} is an apocalyptic number.

168135065702431 is a deficient number, since it is larger than the sum of its proper divisors (1).

168135065702431 is an equidigital number, since it uses as much as digits as its factorization.

168135065702431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 168135065702431 in words is "one hundred sixty-eight trillion, one hundred thirty-five billion, sixty-five million, seven hundred two thousand, four hundred thirty-one".