256553742 has 16 divisors (see below), whose sum is σ = 515768400. Its totient is φ = 85074432.

The previous prime is 256553723. The next prime is 256553767. The reversal of 256553742 is 247355652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 256553742.

It is a congruent number.

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, 109617 + ... + 111932.

It is an arithmetic number, because the mean of its divisors is an integer number (32235525).

Almost surely, 2^256553742 is an apocalyptic number.

256553742 is an abundant number, since it is smaller than the sum of its proper divisors (259214658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256553742 is a wasteful number, since it uses less digits than its factorization.

256553742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221747.

The product of its digits is 252000, while the sum is 39.

The square root of 256553742 is about 16017.2950899957. The cubic root of 256553742 is about 635.4179091264.

The spelling of 256553742 in words is "two hundred fifty-six million, five hundred fifty-three thousand, seven hundred forty-two".