646283506 has 24 divisors (see below), whose sum is σ = 1069160400. Its totient is φ = 292774680.

The previous prime is 646283501. The next prime is 646283513. The reversal of 646283506 is 605382646.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (646283501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69945 + ... + 78643.

It is an arithmetic number, because the mean of its divisors is an integer number (44548350).

Almost surely, 2^646283506 is an apocalyptic number.

646283506 is a deficient number, since it is larger than the sum of its proper divisors (422876894).

646283506 is a wasteful number, since it uses less digits than its factorization.

646283506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030 (or 9019 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 646283506 is about 25422.1066396945. The cubic root of 646283506 is about 864.5849885275.

The spelling of 646283506 in words is "six hundred forty-six million, two hundred eighty-three thousand, five hundred six".