168274988346321 has 24 divisors (see below), whose sum is σ = 244348145900040. Its totient is φ = 111592121389056.

The previous prime is 168274988346319. The next prime is 168274988346331. The reversal of 168274988346321 is 123643889472861.

168274988346321 is a `hidden beast` number, since 1 + 6 + 8 + 2 + 74 + 98 + 8 + 3 + 463 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6874233921 + 168268114112400 = 82911^2 + 12971820^2 .

It is not a de Polignac number, because 168274988346321 - 2¹ = 168274988346319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168274988346321.

It is not an unprimeable number, because it can be changed into a prime (168274988346331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62752956 + ... + 65379533.

It is an arithmetic number, because the mean of its divisors is an integer number (10181172745835).

Almost surely, 2^{168274988346321} is an apocalyptic number.

It is an amenable number.

168274988346321 is a deficient number, since it is larger than the sum of its proper divisors (76073157553719).

168274988346321 is a wasteful number, since it uses less digits than its factorization.

168274988346321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128133265 (or 128133262 counting only the distinct ones).

The product of its digits is 668860416, while the sum is 72.

The spelling of 168274988346321 in words is "one hundred sixty-eight trillion, two hundred seventy-four billion, nine hundred eighty-eight million, three hundred forty-six thousand, three hundred twenty-one".