245664816 has 20 divisors (see below), whose sum is σ = 634634232. Its totient is φ = 81888256.

The previous prime is 245664803. The next prime is 245664823. The reversal of 245664816 is 618466542.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2558961 + ... + 2559056.

Almost surely, 2^245664816 is an apocalyptic number.

It is an amenable number.

245664816 is an abundant number, since it is smaller than the sum of its proper divisors (388969416).

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

245664816 is a wasteful number, since it uses less digits than its factorization.

245664816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118028 (or 5118022 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 245664816 is about 15673.6982234570. The cubic root of 245664816 is about 626.2979456601.

The spelling of 245664816 in words is "two hundred forty-five million, six hundred sixty-four thousand, eight hundred sixteen".