168534435861 has 64 divisors (see below), whose sum is σ = 279949344000. Its totient is φ = 99307296000.

The previous prime is 168534435833. The next prime is 168534435869.

It is a happy number.

168534435861 is a `hidden beast` number, since 1 + 6 + 8 + 53 + 4 + 4 + 3 + 586 + 1 = 666.

168534435861 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 168534435861 - 2⁷ = 168534435733 is a prime.

It is a super-2 number, since 2×168534435861² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 168534435798 and 168534435807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168534435869) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17017011 + ... + 17026911.

It is an arithmetic number, because the mean of its divisors is an integer number (4374208500).

Almost surely, 2^168534435861 is an apocalyptic number.

168534435861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

168534435861 is a deficient number, since it is larger than the sum of its proper divisors (111414908139).

168534435861 is a wasteful number, since it uses less digits than its factorization.

168534435861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11507 (or 11501 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 168534435861 in words is "one hundred sixty-eight billion, five hundred thirty-four million, four hundred thirty-five thousand, eight hundred sixty-one".