255643974 has 24 divisors (see below), whose sum is σ = 583048440. Its totient is φ = 80729568.

The previous prime is 255643967. The next prime is 255644017. The reversal of 255643974 is 479346552.

255643974 is a `hidden beast` number, since 2 + 556 + 4 + 3 + 97 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 373407 + ... + 374090.

It is an arithmetic number, because the mean of its divisors is an integer number (24293685).

Almost surely, 2^255643974 is an apocalyptic number.

255643974 is an abundant number, since it is smaller than the sum of its proper divisors (327404466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255643974 is a wasteful number, since it uses less digits than its factorization.

255643974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747524 (or 747521 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 255643974 is about 15988.8703165671. The cubic root of 255643974 is about 634.6659321195.

The spelling of 255643974 in words is "two hundred fifty-five million, six hundred forty-three thousand, nine hundred seventy-four".