168756429021 has 8 divisors (see below), whose sum is σ = 225012068160. Its totient is φ = 112502537952.

The previous prime is 168756429019. The next prime is 168756429067. The reversal of 168756429021 is 120924657861.

168756429021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168756429021 - 2¹ = 168756429019 is a prime.

It is a super-2 number, since 2×168756429021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168756429071) 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 7 ways as a sum of consecutive naturals, for example, 192160 + ... + 611913.

It is an arithmetic number, because the mean of its divisors is an integer number (28126508520).

Almost surely, 2^168756429021 is an apocalyptic number.

It is an amenable number.

168756429021 is a deficient number, since it is larger than the sum of its proper divisors (56255639139).

168756429021 is an equidigital number, since it uses as much as digits as its factorization.

168756429021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874035.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 168756429021 in words is "one hundred sixty-eight billion, seven hundred fifty-six million, four hundred twenty-nine thousand, twenty-one".