172345044245173 has 4 divisors (see below), whose sum is σ = 173238023749228. Its totient is φ = 171452064741120.

The previous prime is 172345044245167. The next prime is 172345044245183. The reversal of 172345044245173 is 371542440543271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17277847295569 + 155067196949604 = 4156663^2 + 12452598^2 .

It is a cyclic number.

It is not a de Polignac number, because 172345044245173 - 2⁴¹ = 170146020989621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172345044245173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172345044245123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446489751738 + ... + 446489752123.

It is an arithmetic number, because the mean of its divisors is an integer number (43309505937307).

Almost surely, 2^{172345044245173} is an apocalyptic number.

It is an amenable number.

172345044245173 is a deficient number, since it is larger than the sum of its proper divisors (892979504055).

172345044245173 is an equidigital number, since it uses as much as digits as its factorization.

172345044245173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892979504054.

The product of its (nonzero) digits is 11289600, while the sum is 52.

The spelling of 172345044245173 in words is "one hundred seventy-two trillion, three hundred forty-five billion, forty-four million, two hundred forty-five thousand, one hundred seventy-three".