172745568 has 192 divisors, whose sum is σ = 562464000. Its totient is φ = 51259392.

The previous prime is 172745519. The next prime is 172745581. The reversal of 172745568 is 865547271.

172745568 is a `hidden beast` number, since 17 + 2 + 74 + 5 + 568 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278763 + ... + 279381.

It is an arithmetic number, because the mean of its divisors is an integer number (2929500).

Almost surely, 2^172745568 is an apocalyptic number.

172745568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172745568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281232000).

172745568 is an abundant number, since it is smaller than the sum of its proper divisors (389718432).

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

172745568 is a wasteful number, since it uses less digits than its factorization.

172745568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 660 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 172745568 is about 13143.2708257876. The cubic root of 172745568 is about 556.9321698723.

The spelling of 172745568 in words is "one hundred seventy-two million, seven hundred forty-five thousand, five hundred sixty-eight".