256944955 has 8 divisors (see below), whose sum is σ = 308480112. Its totient is φ = 205458528.

The previous prime is 256944943. The next prime is 256944967. The reversal of 256944955 is 559449652.

It is an interprime number because it is at equal distance from previous prime (256944943) and next prime (256944967).

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 256944955 - 2¹³ = 256936763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256944899 and 256944908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652 + ... + 22678.

It is an arithmetic number, because the mean of its divisors is an integer number (38560014).

Almost surely, 2^256944955 is an apocalyptic number.

256944955 is a deficient number, since it is larger than the sum of its proper divisors (51535157).

256944955 is a wasteful number, since it uses less digits than its factorization.

256944955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24365.

The product of its digits is 1944000, while the sum is 49.

The square root of 256944955 is about 16029.5026435632. The cubic root of 256944955 is about 635.7407232319.

It can be divided in two parts, 2569 and 44955, that added together give a square (47524 = 218²).

The spelling of 256944955 in words is "two hundred fifty-six million, nine hundred forty-four thousand, nine hundred fifty-five".