173213026640 has 40 divisors (see below), whose sum is σ = 403200443520. Its totient is φ = 69202603136.

The previous prime is 173213026607. The next prime is 173213026643. The reversal of 173213026640 is 46620312371.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 173213026640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173213026643) 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 7 ways as a sum of consecutive naturals, for example, 1223204 + ... + 1357443.

It is an arithmetic number, because the mean of its divisors is an integer number (10080011088).

Almost surely, 2^173213026640 is an apocalyptic number.

173213026640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

173213026640 is an abundant number, since it is smaller than the sum of its proper divisors (229987416880).

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

173213026640 is a wasteful number, since it uses less digits than its factorization.

173213026640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581499 (or 2581493 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 173213026640 in words is "one hundred seventy-three billion, two hundred thirteen million, twenty-six thousand, six hundred forty".