256955061 has 16 divisors (see below), whose sum is σ = 374054400. Its totient is φ = 155604720.

The previous prime is 256955053. The next prime is 256955081. The reversal of 256955061 is 160559652.

It is not a de Polignac number, because 256955061 - 2³ = 256955053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256955081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53776 + ... + 58358.

It is an arithmetic number, because the mean of its divisors is an integer number (23378400).

Almost surely, 2^256955061 is an apocalyptic number.

It is an amenable number.

256955061 is a deficient number, since it is larger than the sum of its proper divisors (117099339).

256955061 is a wasteful number, since it uses less digits than its factorization.

256955061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 256955061 is about 16029.8178717040. The cubic root of 256955061 is about 635.7490579762.

It can be divided in two parts, 2569 and 55061, that added together give a triangular number (57630 = T₃₃₉).

The spelling of 256955061 in words is "two hundred fifty-six million, nine hundred fifty-five thousand, sixty-one".