255391773173 has 4 divisors (see below), whose sum is σ = 255393434400. Its totient is φ = 255390111948.

The previous prime is 255391773163. The next prime is 255391773179. The reversal of 255391773173 is 371377193552.

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 a cyclic number.

It is not a de Polignac number, because 255391773173 - 2⁸ = 255391772917 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 (255391773179) 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, 573473 + ... + 916326.

It is an arithmetic number, because the mean of its divisors is an integer number (63848358600).

Almost surely, 2^255391773173 is an apocalyptic number.

It is an amenable number.

255391773173 is a deficient number, since it is larger than the sum of its proper divisors (1661227).

255391773173 is a wasteful number, since it uses less digits than its factorization.

255391773173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661226.

The product of its digits is 4167450, while the sum is 53.

The spelling of 255391773173 in words is "two hundred fifty-five billion, three hundred ninety-one million, seven hundred seventy-three thousand, one hundred seventy-three".