255681634 has 8 divisors (see below), whose sum is σ = 413024220. Its totient is φ = 118006896.

The previous prime is 255681623. The next prime is 255681641. The reversal of 255681634 is 436186552.

It can be written as a sum of positive squares in 2 ways, for example, as 252969025 + 2712609 = 15905^2 + 1647^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4916929 + ... + 4916980.

Almost surely, 2^255681634 is an apocalyptic number.

255681634 is a deficient number, since it is larger than the sum of its proper divisors (157342586).

255681634 is a wasteful number, since it uses less digits than its factorization.

255681634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9833924.

The product of its digits is 172800, while the sum is 40.

The square root of 255681634 is about 15990.0479674077. The cubic root of 255681634 is about 634.6970957010.

The spelling of 255681634 in words is "two hundred fifty-five million, six hundred eighty-one thousand, six hundred thirty-four".