256279330977 has 8 divisors (see below), whose sum is σ = 341809303680. Its totient is φ = 170801122800.

The previous prime is 256279330969. The next prime is 256279330997. The reversal of 256279330977 is 779033972652.

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

It is not a de Polignac number, because 256279330977 - 2³ = 256279330969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256279330977.

It is not an unprimeable number, because it can be changed into a prime (256279330997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12929577 + ... + 12949382.

It is an arithmetic number, because the mean of its divisors is an integer number (42726162960).

Almost surely, 2^256279330977 is an apocalyptic number.

It is an amenable number.

256279330977 is a deficient number, since it is larger than the sum of its proper divisors (85529972703).

256279330977 is a wasteful number, since it uses less digits than its factorization.

256279330977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25882263.

The product of its (nonzero) digits is 30005640, while the sum is 60.

The spelling of 256279330977 in words is "two hundred fifty-six billion, two hundred seventy-nine million, three hundred thirty thousand, nine hundred seventy-seven".