256626550 has 12 divisors (see below), whose sum is σ = 477325476. Its totient is φ = 102650600.

The previous prime is 256626541. The next prime is 256626593. The reversal of 256626550 is 55626652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2566216 + ... + 2566315.

It is an arithmetic number, because the mean of its divisors is an integer number (39777123).

Almost surely, 2^256626550 is an apocalyptic number.

256626550 is a deficient number, since it is larger than the sum of its proper divisors (220698926).

256626550 is a wasteful number, since it uses less digits than its factorization.

256626550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132543 (or 5132538 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 256626550 is about 16019.5677220080. The cubic root of 256626550 is about 635.4780123638.

The spelling of 256626550 in words is "two hundred fifty-six million, six hundred twenty-six thousand, five hundred fifty".