256380166847 has 12 divisors (see below), whose sum is σ = 298347115896. Its totient is φ = 219674140560.

The previous prime is 256380166807. The next prime is 256380166873. The reversal of 256380166847 is 748661083652.

It is not a de Polignac number, because 256380166847 - 2¹⁰ = 256380165823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256380166792 and 256380166801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256380166807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 820133 + ... + 1088750.

It is an arithmetic number, because the mean of its divisors is an integer number (24862259658).

Almost surely, 2^256380166847 is an apocalyptic number.

256380166847 is a deficient number, since it is larger than the sum of its proper divisors (41966949049).

256380166847 is a wasteful number, since it uses less digits than its factorization.

256380166847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911638 (or 1911631 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 56.

The spelling of 256380166847 in words is "two hundred fifty-six billion, three hundred eighty million, one hundred sixty-six thousand, eight hundred forty-seven".