256655170427 has 8 divisors (see below), whose sum is σ = 261182485200. Its totient is φ = 252162024480.

The previous prime is 256655170423. The next prime is 256655170451. The reversal of 256655170427 is 724071556652.

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 256655170427 - 2² = 256655170423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256655170423) 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, 8527052 + ... + 8557097.

It is an arithmetic number, because the mean of its divisors is an integer number (32647810650).

Almost surely, 2^256655170427 is an apocalyptic number.

256655170427 is a deficient number, since it is larger than the sum of its proper divisors (4527314773).

256655170427 is a wasteful number, since it uses less digits than its factorization.

256655170427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17084413.

The product of its (nonzero) digits is 3528000, while the sum is 50.

The spelling of 256655170427 in words is "two hundred fifty-six billion, six hundred fifty-five million, one hundred seventy thousand, four hundred twenty-seven".