859974785281 has 2 divisors, whose sum is σ = 859974785282. Its totient is φ = 859974785280.

The previous prime is 859974785233. The next prime is 859974785387. The reversal of 859974785281 is 182587479958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432891623025 + 427083162256 = 657945^2 + 653516^2 .

It is a cyclic number.

It is not a de Polignac number, because 859974785281 - 2⁹ = 859974784769 is a prime.

It is a super-2 number, since 2×859974785281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (859974785881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429987392640 + 429987392641.

It is an arithmetic number, because the mean of its divisors is an integer number (429987392641).

Almost surely, 2^859974785281 is an apocalyptic number.

It is an amenable number.

859974785281 is a deficient number, since it is larger than the sum of its proper divisors (1).

859974785281 is an equidigital number, since it uses as much as digits as its factorization.

859974785281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 406425600, while the sum is 73.

The spelling of 859974785281 in words is "eight hundred fifty-nine billion, nine hundred seventy-four million, seven hundred eighty-five thousand, two hundred eighty-one".