256279267765 has 8 divisors (see below), whose sum is σ = 325625422680. Its totient is φ = 192963213312.

The previous prime is 256279267733. The next prime is 256279267801. The reversal of 256279267765 is 567762972652.

It can be written as a sum of positive squares in 4 ways, for example, as 15212015569 + 241067252196 = 123337^2 + 490986^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 256279267765 - 2⁵ = 256279267733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256279267697 and 256279267706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1507525020 + ... + 1507525189.

It is an arithmetic number, because the mean of its divisors is an integer number (40703177835).

Almost surely, 2^256279267765 is an apocalyptic number.

It is an amenable number.

256279267765 is a deficient number, since it is larger than the sum of its proper divisors (69346154915).

256279267765 is a wasteful number, since it uses less digits than its factorization.

256279267765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015050231.

The product of its digits is 133358400, while the sum is 64.

The spelling of 256279267765 in words is "two hundred fifty-six billion, two hundred seventy-nine million, two hundred sixty-seven thousand, seven hundred sixty-five".