655104512173 has 4 divisors (see below), whose sum is σ = 655132982140. Its totient is φ = 655076042208.

The previous prime is 655104512137. The next prime is 655104512191. The reversal of 655104512173 is 371215401556.

It is a happy number.

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 258208292164 + 396896220009 = 508142^2 + 629997^2 .

It is a cyclic number.

It is not a de Polignac number, because 655104512173 - 2³⁷ = 517665558701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655104512123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14200440 + ... + 14246497.

It is an arithmetic number, because the mean of its divisors is an integer number (163783245535).

Almost surely, 2^655104512173 is an apocalyptic number.

It is an amenable number.

655104512173 is a deficient number, since it is larger than the sum of its proper divisors (28469967).

655104512173 is a wasteful number, since it uses less digits than its factorization.

655104512173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28469966.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 655104512173 in words is "six hundred fifty-five billion, one hundred four million, five hundred twelve thousand, one hundred seventy-three".