168495355517 has 8 divisors (see below), whose sum is σ = 184558807800. Its totient is φ = 153115454464.

The previous prime is 168495355493. The next prime is 168495355531. The reversal of 168495355517 is 715553594861.

It can be written as a sum of positive squares in 4 ways, for example, as 110042139076 + 58453216441 = 331726^2 + 241771^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168495355517 - 2¹² = 168495351421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168495355117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170887292 + ... + 170888277.

It is an arithmetic number, because the mean of its divisors is an integer number (23069850975).

Almost surely, 2^168495355517 is an apocalyptic number.

168495355517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

168495355517 is a deficient number, since it is larger than the sum of its proper divisors (16063452283).

168495355517 is a wasteful number, since it uses less digits than its factorization.

168495355517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341775615.

The product of its digits is 22680000, while the sum is 59.

The spelling of 168495355517 in words is "one hundred sixty-eight billion, four hundred ninety-five million, three hundred fifty-five thousand, five hundred seventeen".