255616747 has 4 divisors (see below), whose sum is σ = 269070280. Its totient is φ = 242163216.

The previous prime is 255616741. The next prime is 255616783. The reversal of 255616747 is 747616552.

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 255616747 - 2⁷ = 255616619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255616741) 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, 6726738 + ... + 6726775.

It is an arithmetic number, because the mean of its divisors is an integer number (67267570).

Almost surely, 2^255616747 is an apocalyptic number.

255616747 is a deficient number, since it is larger than the sum of its proper divisors (13453533).

255616747 is a wasteful number, since it uses less digits than its factorization.

255616747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13453532.

The product of its digits is 352800, while the sum is 43.

The square root of 255616747 is about 15988.0188578823. The cubic root of 255616747 is about 634.6433999204.

The spelling of 255616747 in words is "two hundred fifty-five million, six hundred sixteen thousand, seven hundred forty-seven".