168875578861 has 12 divisors (see below), whose sum is σ = 186064537372. Its totient is φ = 153158544000.

The previous prime is 168875578841. The next prime is 168875578871.

It is a happy number.

168875578861 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 30263821225 + 138611757636 = 173965^2 + 372306^2 .

It is not a de Polignac number, because 168875578861 - 2⁵ = 168875578829 is a prime.

It is a super-2 number, since 2×168875578861² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168875578831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1606620 + ... + 1708501.

Almost surely, 2^168875578861 is an apocalyptic number.

168875578861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

168875578861 is a deficient number, since it is larger than the sum of its proper divisors (17188958511).

168875578861 is a wasteful number, since it uses less digits than its factorization.

168875578861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315564 (or 3315553 counting only the distinct ones).

The product of its digits is 180633600, while the sum is 70.

The spelling of 168875578861 in words is "one hundred sixty-eight billion, eight hundred seventy-five million, five hundred seventy-eight thousand, eight hundred sixty-one".