256670255558 has 16 divisors (see below), whose sum is σ = 395644133664. Its totient is φ = 124792968960.

The previous prime is 256670255519. The next prime is 256670255581. The reversal of 256670255558 is 855552076652.

It is a super-3 number, since 3×256670255558³ (a number of 35 digits) contains 333 as substring.

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, 896378 + ... + 1147533.

It is an arithmetic number, because the mean of its divisors is an integer number (24727758354).

Almost surely, 2^256670255558 is an apocalyptic number.

256670255558 is a deficient number, since it is larger than the sum of its proper divisors (138973878106).

256670255558 is a wasteful number, since it uses less digits than its factorization.

256670255558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045647.

The product of its (nonzero) digits is 25200000, while the sum is 56.

The spelling of 256670255558 in words is "two hundred fifty-six billion, six hundred seventy million, two hundred fifty-five thousand, five hundred fifty-eight".