256276067525665 has 8 divisors (see below), whose sum is σ = 335488670215488. Its totient is φ = 186382594564080.

The previous prime is 256276067525641. The next prime is 256276067525729. The reversal of 256276067525665 is 566525760672652.

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

It is not a de Polignac number, because 256276067525665 - 2⁷ = 256276067525537 is a prime.

It is a super-3 number, since 3×256276067525665³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256276067525594 and 256276067525603.

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, 2329782431997 + ... + 2329782432106.

It is an arithmetic number, because the mean of its divisors is an integer number (41936083776936).

Almost surely, 2^{256276067525665} is an apocalyptic number.

It is an amenable number.

256276067525665 is a deficient number, since it is larger than the sum of its proper divisors (79212602689823).

256276067525665 is a wasteful number, since it uses less digits than its factorization.

256276067525665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659564864119.

The product of its (nonzero) digits is 1905120000, while the sum is 70.

The spelling of 256276067525665 in words is "two hundred fifty-six trillion, two hundred seventy-six billion, sixty-seven million, five hundred twenty-five thousand, six hundred sixty-five".