256444051449 has 16 divisors (see below), whose sum is σ = 345558058560. Its totient is φ = 169154119680.

The previous prime is 256444051439. The next prime is 256444051469. The reversal of 256444051449 is 944150444652.

It is not a de Polignac number, because 256444051449 - 2¹¹ = 256444049401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256444051398 and 256444051407.

It is not an unprimeable number, because it can be changed into a prime (256444051429) 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, 835704 + ... + 1100585.

It is an arithmetic number, because the mean of its divisors is an integer number (21597378660).

Almost surely, 2^256444051449 is an apocalyptic number.

It is an amenable number.

256444051449 is a deficient number, since it is larger than the sum of its proper divisors (89114007111).

256444051449 is a wasteful number, since it uses less digits than its factorization.

256444051449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936760.

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 256444051449 in words is "two hundred fifty-six billion, four hundred forty-four million, fifty-one thousand, four hundred forty-nine".