256222837555 has 4 divisors (see below), whose sum is σ = 307467405072. Its totient is φ = 204978270040.

The previous prime is 256222837531. The next prime is 256222837567. The reversal of 256222837555 is 555738222652.

256222837555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 256222837555 - 2³¹ = 254075353907 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 25622283751 + ... + 25622283760.

It is an arithmetic number, because the mean of its divisors is an integer number (76866851268).

Almost surely, 2^256222837555 is an apocalyptic number.

256222837555 is a deficient number, since it is larger than the sum of its proper divisors (51244567517).

256222837555 is an equidigital number, since it uses as much as digits as its factorization.

256222837555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51244567516.

The product of its digits is 10080000, while the sum is 52.

The spelling of 256222837555 in words is "two hundred fifty-six billion, two hundred twenty-two million, eight hundred thirty-seven thousand, five hundred fifty-five".