646146859 has 2 divisors, whose sum is σ = 646146860. Its totient is φ = 646146858.

The previous prime is 646146847. The next prime is 646146887. The reversal of 646146859 is 958641646.

646146859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646146859 - 2¹³ = 646138667 is a prime.

It is a super-3 number, since 3×646146859³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (646146559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323073429 + 323073430.

It is an arithmetic number, because the mean of its divisors is an integer number (323073430).

Almost surely, 2^646146859 is an apocalyptic number.

646146859 is a deficient number, since it is larger than the sum of its proper divisors (1).

646146859 is an equidigital number, since it uses as much as digits as its factorization.

646146859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 49.

The square root of 646146859 is about 25419.4189351370. The cubic root of 646146859 is about 864.5240497025.

The spelling of 646146859 in words is "six hundred forty-six million, one hundred forty-six thousand, eight hundred fifty-nine".