646076159 has 2 divisors, whose sum is σ = 646076160. Its totient is φ = 646076158.

The previous prime is 646076131. The next prime is 646076173. The reversal of 646076159 is 951670646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646076159 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646076059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323038079 + 323038080.

It is an arithmetic number, because the mean of its divisors is an integer number (323038080).

Almost surely, 2^646076159 is an apocalyptic number.

646076159 is a deficient number, since it is larger than the sum of its proper divisors (1).

646076159 is an equidigital number, since it uses as much as digits as its factorization.

646076159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 646076159 is about 25418.0282280117. The cubic root of 646076159 is about 864.4925170981.

The spelling of 646076159 in words is "six hundred forty-six million, seventy-six thousand, one hundred fifty-nine".