646118164 has 24 divisors (see below), whose sum is σ = 1145894400. Its totient is φ = 318740736.

The previous prime is 646118147. The next prime is 646118183. The reversal of 646118164 is 461811646.

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, 132237 + ... + 137035.

It is an arithmetic number, because the mean of its divisors is an integer number (47745600).

Almost surely, 2^646118164 is an apocalyptic number.

It is an amenable number.

646118164 is a deficient number, since it is larger than the sum of its proper divisors (499776236).

646118164 is a wasteful number, since it uses less digits than its factorization.

646118164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247 (or 5245 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 646118164 is about 25418.8544981870. The cubic root of 646118164 is about 864.5112518457.

The spelling of 646118164 in words is "six hundred forty-six million, one hundred eighteen thousand, one hundred sixty-four".