646425014 has 4 divisors (see below), whose sum is σ = 969637524. Its totient is φ = 323212506.

The previous prime is 646424971. The next prime is 646425037. The reversal of 646425014 is 410524646.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161606252 + ... + 161606255.

It is an arithmetic number, because the mean of its divisors is an integer number (242409381).

Almost surely, 2^646425014 is an apocalyptic number.

646425014 is a deficient number, since it is larger than the sum of its proper divisors (323212510).

646425014 is a wasteful number, since it uses less digits than its factorization.

646425014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323212509.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 646425014 is about 25424.8896556111. The cubic root of 646425014 is about 864.6480861015.

The spelling of 646425014 in words is "six hundred forty-six million, four hundred twenty-five thousand, fourteen".