256383027757 has 4 divisors (see below), whose sum is σ = 256488234556. Its totient is φ = 256277820960.

The previous prime is 256383027713. The next prime is 256383027787. The reversal of 256383027757 is 757720383652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161753578596 + 94629449161 = 402186^2 + 307619^2 .

It is a cyclic number.

It is not a de Polignac number, because 256383027757 - 2²⁷ = 256248810029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256383027698 and 256383027707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256383027787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52599744 + ... + 52604617.

It is an arithmetic number, because the mean of its divisors is an integer number (64122058639).

Almost surely, 2^256383027757 is an apocalyptic number.

It is an amenable number.

256383027757 is a deficient number, since it is larger than the sum of its proper divisors (105206799).

256383027757 is a wasteful number, since it uses less digits than its factorization.

256383027757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105206798.

The product of its (nonzero) digits is 14817600, while the sum is 55.

The spelling of 256383027757 in words is "two hundred fifty-six billion, three hundred eighty-three million, twenty-seven thousand, seven hundred fifty-seven".