646837716 has 48 divisors (see below), whose sum is σ = 1727492480. Its totient is φ = 184533120.

The previous prime is 646837693. The next prime is 646837727. The reversal of 646837716 is 617738646.

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 15 ways as a sum of consecutive naturals, for example, 54126 + ... + 64986.

Almost surely, 2^646837716 is an apocalyptic number.

It is an amenable number.

646837716 is an abundant number, since it is smaller than the sum of its proper divisors (1080654764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646837716 is a wasteful number, since it uses less digits than its factorization.

646837716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11584 (or 11582 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The square root of 646837716 is about 25433.0044627055. The cubic root of 646837716 is about 864.8320548905.

The spelling of 646837716 in words is "six hundred forty-six million, eight hundred thirty-seven thousand, seven hundred sixteen".