173320645376 has 72 divisors (see below), whose sum is σ = 350958152160. Its totient is φ = 85417721856.

The previous prime is 173320645327. The next prime is 173320645403. The reversal of 173320645376 is 673546023371.

It is a super-2 number, since 2×173320645376² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 173320645376.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5369381 + ... + 5401563.

It is an arithmetic number, because the mean of its divisors is an integer number (4874418780).

Almost surely, 2^173320645376 is an apocalyptic number.

173320645376 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 173320645376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175479076080).

173320645376 is an abundant number, since it is smaller than the sum of its proper divisors (177637506784).

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

173320645376 is a wasteful number, since it uses less digits than its factorization.

173320645376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32501 (or 32487 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 47.

The spelling of 173320645376 in words is "one hundred seventy-three billion, three hundred twenty million, six hundred forty-five thousand, three hundred seventy-six".