255511611 has 16 divisors (see below), whose sum is σ = 378846720. Its totient is φ = 170201160.

The previous prime is 255511591. The next prime is 255511621. The reversal of 255511611 is 116115552.

It is a de Polignac number, because none of the positive numbers 2^k-255511611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (255511621) 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 15 ways as a sum of consecutive naturals, for example, 37666 + ... + 43928.

It is an arithmetic number, because the mean of its divisors is an integer number (23677920).

Almost surely, 2^255511611 is an apocalyptic number.

255511611 is a deficient number, since it is larger than the sum of its proper divisors (123335109).

255511611 is a wasteful number, since it uses less digits than its factorization.

255511611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7783 (or 7777 counting only the distinct ones).

The product of its digits is 1500, while the sum is 27.

The square root of 255511611 is about 15984.7305576291. The cubic root of 255511611 is about 634.5563776898.

The spelling of 255511611 in words is "two hundred fifty-five million, five hundred eleven thousand, six hundred eleven".