255673643 has 4 divisors (see below), whose sum is σ = 260497728. Its totient is φ = 250849560.

The previous prime is 255673637. The next prime is 255673673. The reversal of 255673643 is 346376552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255673643 - 2²² = 251479339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255673643.

It is not an unprimeable number, because it can be changed into a prime (255673673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2411963 + ... + 2412068.

It is an arithmetic number, because the mean of its divisors is an integer number (65124432).

Almost surely, 2^255673643 is an apocalyptic number.

255673643 is a deficient number, since it is larger than the sum of its proper divisors (4824085).

255673643 is an equidigital number, since it uses as much as digits as its factorization.

255673643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4824084.

The product of its digits is 453600, while the sum is 41.

The square root of 255673643 is about 15989.7980912831. The cubic root of 255673643 is about 634.6904834188.

The spelling of 255673643 in words is "two hundred fifty-five million, six hundred seventy-three thousand, six hundred forty-three".