256051705790 has 8 divisors (see below), whose sum is σ = 460893070440. Its totient is φ = 102420682312.

The previous prime is 256051705783. The next prime is 256051705873. The reversal of 256051705790 is 97507150652.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12802585280 + ... + 12802585299.

It is an arithmetic number, because the mean of its divisors is an integer number (57611633805).

Almost surely, 2^256051705790 is an apocalyptic number.

256051705790 is a deficient number, since it is larger than the sum of its proper divisors (204841364650).

256051705790 is a wasteful number, since it uses less digits than its factorization.

256051705790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25605170586.

The product of its (nonzero) digits is 661500, while the sum is 47.

The spelling of 256051705790 in words is "two hundred fifty-six billion, fifty-one million, seven hundred five thousand, seven hundred ninety".