172228685376 has 224 divisors, whose sum is σ = 519921110016. Its totient is φ = 49806592000.

The previous prime is 172228685323. The next prime is 172228685389. The reversal of 172228685376 is 673586822271.

It is a super-2 number, since 2×172228685376² (a number of 23 digits) contains 22 as substring.

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, 22389691 + ... + 22397381.

It is an arithmetic number, because the mean of its divisors is an integer number (2321076384).

Almost surely, 2^172228685376 is an apocalyptic number.

172228685376 is a gapful number since it is divisible by the number (16) 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 172228685376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259960555008).

172228685376 is an abundant number, since it is smaller than the sum of its proper divisors (347692424640).

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

172228685376 is a wasteful number, since it uses less digits than its factorization.

172228685376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8201 (or 8191 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 57.

The spelling of 172228685376 in words is "one hundred seventy-two billion, two hundred twenty-eight million, six hundred eighty-five thousand, three hundred seventy-six".