256409799267 has 8 divisors (see below), whose sum is σ = 359873402560. Its totient is φ = 161943031080.

The previous prime is 256409799253. The next prime is 256409799299. The reversal of 256409799267 is 762997904652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256409799267 - 2¹⁵ = 256409766499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256409799198 and 256409799207.

It is not an unprimeable number, because it can be changed into a prime (256409099267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2249208709 + ... + 2249208822.

It is an arithmetic number, because the mean of its divisors is an integer number (44984175320).

Almost surely, 2^256409799267 is an apocalyptic number.

256409799267 is a deficient number, since it is larger than the sum of its proper divisors (103463603293).

256409799267 is a wasteful number, since it uses less digits than its factorization.

256409799267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4498417553.

The product of its (nonzero) digits is 102876480, while the sum is 66.

The spelling of 256409799267 in words is "two hundred fifty-six billion, four hundred nine million, seven hundred ninety-nine thousand, two hundred sixty-seven".