256376076305 has 16 divisors (see below), whose sum is σ = 326636064000. Its totient is φ = 192510097152.

The previous prime is 256376076289. The next prime is 256376076337. The reversal of 256376076305 is 503670673652.

It is a cyclic number.

It is not a de Polignac number, because 256376076305 - 2⁴ = 256376076289 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4078055 + ... + 4140444.

It is an arithmetic number, because the mean of its divisors is an integer number (20414754000).

Almost surely, 2^256376076305 is an apocalyptic number.

It is an amenable number.

256376076305 is a deficient number, since it is larger than the sum of its proper divisors (70259987695).

256376076305 is a wasteful number, since it uses less digits than its factorization.

256376076305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8218888.

The product of its (nonzero) digits is 4762800, while the sum is 50.

The spelling of 256376076305 in words is "two hundred fifty-six billion, three hundred seventy-six million, seventy-six thousand, three hundred five".