563764644 has 24 divisors (see below), whose sum is σ = 1461612320. Its totient is φ = 187921512.

The previous prime is 563764639. The next prime is 563764673. The reversal of 563764644 is 446467365.

It is a happy number.

563764644 is a `hidden beast` number, since 5 + 637 + 6 + 4 + 6 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 563764644.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2609914 + ... + 2610129.

Almost surely, 2^563764644 is an apocalyptic number.

563764644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

563764644 is an abundant number, since it is smaller than the sum of its proper divisors (897847676).

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

563764644 is a wasteful number, since it uses less digits than its factorization.

563764644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220056 (or 5220048 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 45.

The square root of 563764644 is about 23743.7285193375. The cubic root of 563764644 is about 826.0999806670.

The spelling of 563764644 in words is "five hundred sixty-three million, seven hundred sixty-four thousand, six hundred forty-four".