255523173049 has 3 divisors (see below), whose sum is σ = 255523678543. Its totient is φ = 255522667556.

The previous prime is 255523173043. The next prime is 255523173077. The reversal of 255523173049 is 940371325552.

The square root of 255523173049 is 505493.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 970634025 + 254552539024 = 31155^2 + 504532^2 .

It is not a de Polignac number, because 255523173049 - 2⁹ = 255523172537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255523173043) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 252747 + ... + 758239.

Almost surely, 2^255523173049 is an apocalyptic number.

255523173049 is the 505493-rd square number.

255523173049 is the 252747-th centered octagonal number.

It is an amenable number.

255523173049 is a deficient number, since it is larger than the sum of its proper divisors (505494).

255523173049 is an frugal number, since it uses more digits than its factorization.

255523173049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010986 (or 505493 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 255523173049 in words is "two hundred fifty-five billion, five hundred twenty-three million, one hundred seventy-three thousand, forty-nine".