255681635 has 8 divisors (see below), whose sum is σ = 334710576. Its totient is φ = 185950240.

The previous prime is 255681623. The next prime is 255681641. The reversal of 255681635 is 536186552.

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

It is not a de Polignac number, because 255681635 - 2²⁰ = 254633059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255681592 and 255681601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2324324 + ... + 2324433.

It is an arithmetic number, because the mean of its divisors is an integer number (41838822).

Almost surely, 2^255681635 is an apocalyptic number.

255681635 is a deficient number, since it is larger than the sum of its proper divisors (79028941).

255681635 is a wasteful number, since it uses less digits than its factorization.

255681635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648773.

The product of its digits is 216000, while the sum is 41.

The square root of 255681635 is about 15990.0479986772. The cubic root of 255681635 is about 634.6970965285.

The spelling of 255681635 in words is "two hundred fifty-five million, six hundred eighty-one thousand, six hundred thirty-five".