646306463 has 16 divisors (see below), whose sum is σ = 738415872. Its totient is φ = 559944000.

The previous prime is 646306421. The next prime is 646306483. The reversal of 646306463 is 364603646.

It is a de Polignac number, because none of the positive numbers 2^k-646306463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646306403) 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 in 15 ways as a sum of consecutive naturals, for example, 66548 + ... + 75638.

It is an arithmetic number, because the mean of its divisors is an integer number (46150992).

Almost surely, 2^646306463 is an apocalyptic number.

646306463 is a deficient number, since it is larger than the sum of its proper divisors (92109409).

646306463 is a wasteful number, since it uses less digits than its factorization.

646306463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9406.

The product of its (nonzero) digits is 186624, while the sum is 38.

The square root of 646306463 is about 25422.5581521608. The cubic root of 646306463 is about 864.5952255428.

The spelling of 646306463 in words is "six hundred forty-six million, three hundred six thousand, four hundred sixty-three".