646974116 has 12 divisors (see below), whose sum is σ = 1133943132. Its totient is φ = 322990368.

The previous prime is 646974101. The next prime is 646974157. The reversal of 646974116 is 611479646.

It can be written as a sum of positive squares in 2 ways, for example, as 299151616 + 347822500 = 17296^2 + 18650^2 .

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, 121235 + ... + 126458.

It is an arithmetic number, because the mean of its divisors is an integer number (94495261).

Almost surely, 2^646974116 is an apocalyptic number.

It is an amenable number.

646974116 is a deficient number, since it is larger than the sum of its proper divisors (486969016).

646974116 is a wasteful number, since it uses less digits than its factorization.

646974116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248350 (or 248348 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 646974116 is about 25435.6858763431. The cubic root of 646974116 is about 864.8928402563.

The spelling of 646974116 in words is "six hundred forty-six million, nine hundred seventy-four thousand, one hundred sixteen".