172159568 has 80 divisors (see below), whose sum is σ = 392641536. Its totient is φ = 71608320.

The previous prime is 172159499. The next prime is 172159591. The reversal of 172159568 is 865951271.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771905 + ... + 772127.

Almost surely, 2^172159568 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 172159568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196320768).

172159568 is an abundant number, since it is smaller than the sum of its proper divisors (220481968).

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

172159568 is a wasteful number, since it uses less digits than its factorization.

172159568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 406 counting only the distinct ones).

The product of its digits is 151200, while the sum is 44.

The square root of 172159568 is about 13120.9591112845. The cubic root of 172159568 is about 556.3017012416.

The spelling of 172159568 in words is "one hundred seventy-two million, one hundred fifty-nine thousand, five hundred sixty-eight".