173381464881 has 9 divisors (see below), whose sum is σ = 250441698091. Its totient is φ = 115586810472.

The previous prime is 173381464859. The next prime is 173381464967. The reversal of 173381464881 is 188464183371.

The square root of 173381464881 is 416391.

It is a perfect power (a square), and thus also a powerful number.

173381464881 is a `hidden beast` number, since 1 + 73 + 38 + 1 + 464 + 8 + 81 = 666.

173381464881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 167653397025 + 5728067856 = 409455^2 + 75684^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-173381464881 is a prime.

It is a super-2 number, since 2×173381464881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (173381064881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1179775 + ... + 1318571.

Almost surely, 2^173381464881 is an apocalyptic number.

173381464881 is the 416391-st square number.

173381464881 is the 208196-th centered octagonal number.

It is an amenable number.

173381464881 is a deficient number, since it is larger than the sum of its proper divisors (77060233210).

173381464881 is an frugal number, since it uses more digits than its factorization.

173381464881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277600 (or 138800 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 173381464881 in words is "one hundred seventy-three billion, three hundred eighty-one million, four hundred sixty-four thousand, eight hundred eighty-one".