256766173033003 has 2 divisors, whose sum is σ = 256766173033004. Its totient is φ = 256766173033002.

The previous prime is 256766173032923. The next prime is 256766173033009. The reversal of 256766173033003 is 300330371667652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256766173033003 is a prime.

It is a super-2 number, since 2×256766173033003² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256766173033009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128383086516501 + 128383086516502.

It is an arithmetic number, because the mean of its divisors is an integer number (128383086516502).

Almost surely, 2^{256766173033003} is an apocalyptic number.

256766173033003 is a deficient number, since it is larger than the sum of its proper divisors (1).

256766173033003 is an equidigital number, since it uses as much as digits as its factorization.

256766173033003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8573040, while the sum is 52.

The spelling of 256766173033003 in words is "two hundred fifty-six trillion, seven hundred sixty-six billion, one hundred seventy-three million, thirty-three thousand, three".