173145666672 has 480 divisors, whose sum is σ = 593753711616. Its totient is φ = 46450483200.

The previous prime is 173145666653. The next prime is 173145666677. The reversal of 173145666672 is 276666541371.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173145666677) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 37777693 + ... + 37782275.

Almost surely, 2^173145666672 is an apocalyptic number.

173145666672 is a gapful number since it is divisible by the number (12) 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 173145666672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296876855808).

173145666672 is an abundant number, since it is smaller than the sum of its proper divisors (420608044944).

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

173145666672 is a wasteful number, since it uses less digits than its factorization.

173145666672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709 (or 4700 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 54.

The spelling of 173145666672 in words is "one hundred seventy-three billion, one hundred forty-five million, six hundred sixty-six thousand, six hundred seventy-two".