168086221641 has 12 divisors (see below), whose sum is σ = 261467456068. Its totient is φ = 103437674784.

The previous prime is 168086221553. The next prime is 168086221697. The reversal of 168086221641 is 146122680861.

It is a happy number.

168086221641 is a `hidden beast` number, since 1 + 6 + 8 + 0 + 8 + 622 + 16 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 59937322041 + 108148899600 = 244821^2 + 328860^2 .

It is not a de Polignac number, because 168086221641 - 2²¹ = 168084124489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168086221241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 718317070 + ... + 718317303.

Almost surely, 2^168086221641 is an apocalyptic number.

It is an amenable number.

168086221641 is a deficient number, since it is larger than the sum of its proper divisors (93381234427).

168086221641 is a wasteful number, since it uses less digits than its factorization.

168086221641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436634392 (or 1436634389 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 168086221641 in words is "one hundred sixty-eight billion, eighty-six million, two hundred twenty-one thousand, six hundred forty-one".