256383027771 has 16 divisors (see below), whose sum is σ = 368187432480. Its totient is φ = 157753728000.

The previous prime is 256383027713. The next prime is 256383027787. The reversal of 256383027771 is 177720383652.

It is not a de Polignac number, because 256383027771 - 2¹⁵ = 256382995003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256383027071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118230 + ... + 725771.

It is an arithmetic number, because the mean of its divisors is an integer number (23011714530).

Almost surely, 2^256383027771 is an apocalyptic number.

256383027771 is a deficient number, since it is larger than the sum of its proper divisors (111804404709).

256383027771 is a wasteful number, since it uses less digits than its factorization.

256383027771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851806.

The product of its (nonzero) digits is 2963520, while the sum is 51.

The spelling of 256383027771 in words is "two hundred fifty-six billion, three hundred eighty-three million, twenty-seven thousand, seven hundred seventy-one".