255487595173 has 4 divisors (see below), whose sum is σ = 270516277260. Its totient is φ = 240458913088.

The previous prime is 255487595161. The next prime is 255487595177. The reversal of 255487595173 is 371595784552.

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 72112657444 + 183374937729 = 268538^2 + 428223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255487595173 is a prime.

It is a super-2 number, since 2×255487595173² (a number of 24 digits) contains 22 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 (255487595177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7514341018 + ... + 7514341051.

It is an arithmetic number, because the mean of its divisors is an integer number (67629069315).

Almost surely, 2^255487595173 is an apocalyptic number.

It is an amenable number.

255487595173 is a deficient number, since it is larger than the sum of its proper divisors (15028682087).

255487595173 is a wasteful number, since it uses less digits than its factorization.

255487595173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15028682086.

The product of its digits is 52920000, while the sum is 61.

The spelling of 255487595173 in words is "two hundred fifty-five billion, four hundred eighty-seven million, five hundred ninety-five thousand, one hundred seventy-three".