168352644505 has 8 divisors (see below), whose sum is σ = 202077313992. Its totient is φ = 134646021888.

The previous prime is 168352644491. The next prime is 168352644517. The reversal of 168352644505 is 505446253861.

It can be written as a sum of positive squares in 4 ways, for example, as 64781957529 + 103570686976 = 254523^2 + 321824^2 .

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 168352644505 - 2⁷ = 168352644377 is a prime.

It is a super-2 number, since 2×168352644505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4491184 + ... + 4528513.

It is an arithmetic number, because the mean of its divisors is an integer number (25259664249).

Almost surely, 2^168352644505 is an apocalyptic number.

It is an amenable number.

168352644505 is a deficient number, since it is larger than the sum of its proper divisors (33724669487).

168352644505 is an equidigital number, since it uses as much as digits as its factorization.

168352644505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9023435.

The product of its (nonzero) digits is 3456000, while the sum is 49.

The spelling of 168352644505 in words is "one hundred sixty-eight billion, three hundred fifty-two million, six hundred forty-four thousand, five hundred five".