255643773 has 32 divisors (see below), whose sum is σ = 449971200. Its totient is φ = 124988160.

The previous prime is 255643769. The next prime is 255643777. The reversal of 255643773 is 377346552.

It is an interprime number because it is at equal distance from previous prime (255643769) and next prime (255643777).

It is not a de Polignac number, because 255643773 - 2² = 255643769 is a prime.

It is a super-4 number, since 4×255643773⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255643777) 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 31 ways as a sum of consecutive naturals, for example, 28623 + ... + 36476.

It is an arithmetic number, because the mean of its divisors is an integer number (14061600).

Almost surely, 2^255643773 is an apocalyptic number.

It is an amenable number.

255643773 is a deficient number, since it is larger than the sum of its proper divisors (194327427).

255643773 is a wasteful number, since it uses less digits than its factorization.

255643773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65137.

The product of its digits is 529200, while the sum is 42.

The square root of 255643773 is about 15988.8640309435. The cubic root of 255643773 is about 634.6657657842.

The spelling of 255643773 in words is "two hundred fifty-five million, six hundred forty-three thousand, seven hundred seventy-three".