256555551122 has 32 divisors (see below), whose sum is σ = 415316764800. Its totient is φ = 118158784128.

The previous prime is 256555551121. The next prime is 256555551137. The reversal of 256555551122 is 221155555652.

It is not an unprimeable number, because it can be changed into a prime (256555551121) 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, 56770379 + ... + 56774897.

It is an arithmetic number, because the mean of its divisors is an integer number (12978648900).

Almost surely, 2^256555551122 is an apocalyptic number.

256555551122 is a deficient number, since it is larger than the sum of its proper divisors (158761213678).

256555551122 is a wasteful number, since it uses less digits than its factorization.

256555551122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8690.

The product of its digits is 750000, while the sum is 44.

The spelling of 256555551122 in words is "two hundred fifty-six billion, five hundred fifty-five million, five hundred fifty-one thousand, one hundred twenty-two".