173320771720 has 128 divisors (see below), whose sum is σ = 420921100800. Its totient is φ = 64027431936.

The previous prime is 173320771699. The next prime is 173320771751. The reversal of 173320771720 is 27177023371.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6310257 + ... + 6337663.

It is an arithmetic number, because the mean of its divisors is an integer number (3288446100).

Almost surely, 2^173320771720 is an apocalyptic number.

173320771720 is a gapful number since it is divisible by the number (10) 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 173320771720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210460550400).

173320771720 is an abundant number, since it is smaller than the sum of its proper divisors (247600329080).

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

173320771720 is a wasteful number, since it uses less digits than its factorization.

173320771720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27647 (or 27643 counting only the distinct ones).

The product of its (nonzero) digits is 86436, while the sum is 40.

The spelling of 173320771720 in words is "one hundred seventy-three billion, three hundred twenty million, seven hundred seventy-one thousand, seven hundred twenty".