646397116 has 24 divisors (see below), whose sum is σ = 1155183120. Its totient is φ = 316372992.

The previous prime is 646397093. The next prime is 646397123. The reversal of 646397116 is 611793646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95740 + ... + 102268.

It is an arithmetic number, because the mean of its divisors is an integer number (48132630).

Almost surely, 2^646397116 is an apocalyptic number.

It is an amenable number.

646397116 is a deficient number, since it is larger than the sum of its proper divisors (508786004).

646397116 is a wasteful number, since it uses less digits than its factorization.

646397116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7053 (or 7051 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 646397116 is about 25424.3410140755. The cubic root of 646397116 is about 864.6356472784.

The spelling of 646397116 in words is "six hundred forty-six million, three hundred ninety-seven thousand, one hundred sixteen".