256616479 has 20 divisors (see below), whose sum is σ = 317028384. Its totient is φ = 206985408.

The previous prime is 256616473. The next prime is 256616483. The reversal of 256616479 is 974616652.

It is not a de Polignac number, because 256616479 - 2³ = 256616471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256616471) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37674 + ... + 43960.

Almost surely, 2^256616479 is an apocalyptic number.

256616479 is a deficient number, since it is larger than the sum of its proper divisors (60411905).

256616479 is an frugal number, since it uses more digits than its factorization.

256616479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332 (or 6311 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 256616479 is about 16019.2533845994. The cubic root of 256616479 is about 635.4696993986.

The spelling of 256616479 in words is "two hundred fifty-six million, six hundred sixteen thousand, four hundred seventy-nine".