255605645 has 8 divisors (see below), whose sum is σ = 306815256. Its totient is φ = 204425536.

The previous prime is 255605639. The next prime is 255605653. The reversal of 255605645 is 546506552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19245769 + 236359876 = 4387^2 + 15374^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 255605645 - 2¹⁴ = 255589261 is a prime.

It is a super-3 number, since 3×255605645³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255605599 and 255605608.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 23279 + ... + 32451.

It is an arithmetic number, because the mean of its divisors is an integer number (38351907).

Almost surely, 2^255605645 is an apocalyptic number.

It is an amenable number.

255605645 is a deficient number, since it is larger than the sum of its proper divisors (51209611).

255605645 is an equidigital number, since it uses as much as digits as its factorization.

255605645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14751.

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 255605645 is about 15987.6716566234. The cubic root of 255605645 is about 634.6342117991.

The spelling of 255605645 in words is "two hundred fifty-five million, six hundred five thousand, six hundred forty-five".