168223022500 has 135 divisors (see below), whose sum is σ = 398976843573. Its totient is φ = 62014680000.

The previous prime is 168223022479. The next prime is 168223022507. The reversal of 168223022500 is 5220322861.

The square root of 168223022500 is 410150.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 166158955876 + 2064066624 = 407626^2 + 45432^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168223022507) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 266597185 + ... + 266597815.

Almost surely, 2^168223022500 is an apocalyptic number.

168223022500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168223022500 is the 410150-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168223022500

168223022500 is an abundant number, since it is smaller than the sum of its proper divisors (230753821073).

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

168223022500 is an frugal number, since it uses more digits than its factorization.

168223022500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 168223022500 in words is "one hundred sixty-eight billion, two hundred twenty-three million, twenty-two thousand, five hundred".