168252188882921 has 64 divisors (see below), whose sum is σ = 217142408448000. Its totient is φ = 127928937185280.

The previous prime is 168252188882881. The next prime is 168252188882927. The reversal of 168252188882921 is 129288881252861.

It is not a de Polignac number, because 168252188882921 - 2¹⁰ = 168252188881897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168252188882927) 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, 548455145 + ... + 548761833.

It is an arithmetic number, because the mean of its divisors is an integer number (3392850132000).

Almost surely, 2^{168252188882921} is an apocalyptic number.

168252188882921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

168252188882921 is a deficient number, since it is larger than the sum of its proper divisors (48890219565079).

168252188882921 is a wasteful number, since it uses less digits than its factorization.

168252188882921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315534.

The product of its digits is 141557760, while the sum is 71.

The spelling of 168252188882921 in words is "one hundred sixty-eight trillion, two hundred fifty-two billion, one hundred eighty-eight million, eight hundred eighty-two thousand, nine hundred twenty-one".