173906384645449 has 9 divisors (see below), whose sum is σ = 174003510986733. Its totient is φ = 173809312510572.

The previous prime is 173906384645447. The next prime is 173906384645489. The reversal of 173906384645449 is 944546483609371.

The square root of 173906384645449 is 13187357.

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

It is not a de Polignac number, because 173906384645449 - 2¹ = 173906384645447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173906384645447) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 40603870062 + ... + 40603874344.

Almost surely, 2^{173906384645449} is an apocalyptic number.

173906384645449 is the 13187357-th square number.

173906384645449 is the 6593679-th centered octagonal number.

It is an amenable number.

173906384645449 is a deficient number, since it is larger than the sum of its proper divisors (97126341284).

173906384645449 is an frugal number, since it uses more digits than its factorization.

173906384645449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14724 (or 7362 counting only the distinct ones).

The product of its (nonzero) digits is 1881169920, while the sum is 73.

The spelling of 173906384645449 in words is "one hundred seventy-three trillion, nine hundred six billion, three hundred eighty-four million, six hundred forty-five thousand, four hundred forty-nine".