646124016 has 20 divisors (see below), whose sum is σ = 1669153832. Its totient is φ = 215374656.

The previous prime is 646123999. The next prime is 646124029. The reversal of 646124016 is 610421646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6730411 + ... + 6730506.

Almost surely, 2^646124016 is an apocalyptic number.

It is an amenable number.

646124016 is an abundant number, since it is smaller than the sum of its proper divisors (1023029816).

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

646124016 is a wasteful number, since it uses less digits than its factorization.

646124016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13460928 (or 13460922 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 646124016 is about 25418.9696093292. The cubic root of 646124016 is about 864.5138618454.

The spelling of 646124016 in words is "six hundred forty-six million, one hundred twenty-four thousand, sixteen".