256044381154405 has 16 divisors (see below), whose sum is σ = 315306293125824. Its totient is φ = 199484562171520.

The previous prime is 256044381154357. The next prime is 256044381154439. The reversal of 256044381154405 is 504451183440652.

It is not a de Polignac number, because 256044381154405 - 2¹⁹ = 256044380630117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1109118139 + ... + 1109348968.

It is an arithmetic number, because the mean of its divisors is an integer number (19706643320364).

Almost surely, 2^{256044381154405} is an apocalyptic number.

It is an amenable number.

256044381154405 is a deficient number, since it is larger than the sum of its proper divisors (59261911971419).

256044381154405 is a wasteful number, since it uses less digits than its factorization.

256044381154405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218467716.

The product of its (nonzero) digits is 9216000, while the sum is 52.

The spelling of 256044381154405 in words is "two hundred fifty-six trillion, forty-four billion, three hundred eighty-one million, one hundred fifty-four thousand, four hundred five".