168632722891 has 16 divisors (see below), whose sum is σ = 184336588800. Its totient is φ = 153767341728.

The previous prime is 168632722879. The next prime is 168632722897. The reversal of 168632722891 is 198227236861.

168632722891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 168632722891 - 2¹¹ = 168632720843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168632722897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1547451 + ... + 1652836.

It is an arithmetic number, because the mean of its divisors is an integer number (11521036800).

Almost surely, 2^168632722891 is an apocalyptic number.

168632722891 is a deficient number, since it is larger than the sum of its proper divisors (15703865909).

168632722891 is a wasteful number, since it uses less digits than its factorization.

168632722891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200418.

The product of its digits is 3483648, while the sum is 55.

The spelling of 168632722891 in words is "one hundred sixty-eight billion, six hundred thirty-two million, seven hundred twenty-two thousand, eight hundred ninety-one".