168643621752 has 16 divisors (see below), whose sum is σ = 421609054440. Its totient is φ = 56214540576.

The previous prime is 168643621687. The next prime is 168643621759. The reversal of 168643621752 is 257126346861.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 168643621695 and 168643621704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168643621759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3513408763 + ... + 3513408810.

Almost surely, 2^168643621752 is an apocalyptic number.

168643621752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

168643621752 is an abundant number, since it is smaller than the sum of its proper divisors (252965432688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168643621752 is a wasteful number, since it uses less digits than its factorization.

168643621752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7026817582 (or 7026817578 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 51.

The spelling of 168643621752 in words is "one hundred sixty-eight billion, six hundred forty-three million, six hundred twenty-one thousand, seven hundred fifty-two".