168538550272 has 104 divisors (see below), whose sum is σ = 342586936800. Its totient is φ = 82887966720.

The previous prime is 168538550251. The next prime is 168538550293. The reversal of 168538550272 is 272055835861.

It is an interprime number because it is at equal distance from previous prime (168538550251) and next prime (168538550293).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179105322 + ... + 179106262.

Almost surely, 2^168538550272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168538550272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171293468400).

168538550272 is an abundant number, since it is smaller than the sum of its proper divisors (174048386528).

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

168538550272 is an frugal number, since it uses more digits than its factorization.

168538550272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 168538550272 in words is "one hundred sixty-eight billion, five hundred thirty-eight million, five hundred fifty thousand, two hundred seventy-two".