255502828173 has 4 divisors (see below), whose sum is σ = 340670437568. Its totient is φ = 170335218780.

The previous prime is 255502828171. The next prime is 255502828181. The reversal of 255502828173 is 371828205552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255502828173 - 2¹ = 255502828171 is a prime.

It is a super-3 number, since 3×255502828173³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255502828171) 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, 42583804693 + ... + 42583804698.

It is an arithmetic number, because the mean of its divisors is an integer number (85167609392).

Almost surely, 2^255502828173 is an apocalyptic number.

It is an amenable number.

255502828173 is a deficient number, since it is larger than the sum of its proper divisors (85167609395).

255502828173 is an equidigital number, since it uses as much as digits as its factorization.

255502828173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85167609394.

The product of its (nonzero) digits is 1344000, while the sum is 48.

The spelling of 255502828173 in words is "two hundred fifty-five billion, five hundred two million, eight hundred twenty-eight thousand, one hundred seventy-three".