646430552 has 32 divisors (see below), whose sum is σ = 1247123520. Its totient is φ = 313896960.

The previous prime is 646430537. The next prime is 646430563. The reversal of 646430552 is 255034646.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 188033 + ... + 191439.

It is an arithmetic number, because the mean of its divisors is an integer number (38972610).

Almost surely, 2^646430552 is an apocalyptic number.

It is an amenable number.

646430552 is a deficient number, since it is larger than the sum of its proper divisors (600692968).

646430552 is a wasteful number, since it uses less digits than its factorization.

646430552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091 (or 4087 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 646430552 is about 25424.9985644051. The cubic root of 646430552 is about 864.6505552755.

The spelling of 646430552 in words is "six hundred forty-six million, four hundred thirty thousand, five hundred fifty-two".