173271021345 has 64 divisors (see below), whose sum is σ = 318815481600. Its totient is φ = 89180904960.

The previous prime is 173271021337. The next prime is 173271021359. The reversal of 173271021345 is 543120172371.

173271021345 is a `hidden beast` number, since 173 + 271 + 0 + 213 + 4 + 5 = 666.

173271021345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 173271021345 - 2³ = 173271021337 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 8920414 + ... + 8939816.

It is an arithmetic number, because the mean of its divisors is an integer number (4981491900).

Almost surely, 2^173271021345 is an apocalyptic number.

173271021345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

173271021345 is a deficient number, since it is larger than the sum of its proper divisors (145544460255).

173271021345 is a wasteful number, since it uses less digits than its factorization.

173271021345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21727 (or 21721 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 173271021345 in words is "one hundred seventy-three billion, two hundred seventy-one million, twenty-one thousand, three hundred forty-five".