256657741 has 8 divisors (see below), whose sum is σ = 262886400. Its totient is φ = 250461168.

The previous prime is 256657703. The next prime is 256657763. The reversal of 256657741 is 147756652.

256657741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 256657741 - 2²⁷ = 122440013 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 (256657241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8580 + ... + 24226.

It is an arithmetic number, because the mean of its divisors is an integer number (32860800).

Almost surely, 2^256657741 is an apocalyptic number.

It is an amenable number.

256657741 is a deficient number, since it is larger than the sum of its proper divisors (6228659).

256657741 is a wasteful number, since it uses less digits than its factorization.

256657741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16043.

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

The square root of 256657741 is about 16020.5412205705. The cubic root of 256657741 is about 635.5037571562.

The spelling of 256657741 in words is "two hundred fifty-six million, six hundred fifty-seven thousand, seven hundred forty-one".