646560146 has 4 divisors (see below), whose sum is σ = 969840222. Its totient is φ = 323280072.

The previous prime is 646560127. The next prime is 646560181. The reversal of 646560146 is 641065646.

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

It can be written as a sum of positive squares in only one way, i.e., 567154225 + 79405921 = 23815^2 + 8911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161640035 + ... + 161640038.

Almost surely, 2^646560146 is an apocalyptic number.

646560146 is a deficient number, since it is larger than the sum of its proper divisors (323280076).

646560146 is a wasteful number, since it uses less digits than its factorization.

646560146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323280075.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 646560146 is about 25427.5469914028. The cubic root of 646560146 is about 864.7083320604.

The spelling of 646560146 in words is "six hundred forty-six million, five hundred sixty thousand, one hundred forty-six".