561456784 has 40 divisors (see below), whose sum is σ = 1261798208. Its totient is φ = 237029760.

The previous prime is 561456761. The next prime is 561456787. The reversal of 561456784 is 487654165.

It is not an unprimeable number, because it can be changed into a prime (561456787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29907 + ... + 44914.

Almost surely, 2^561456784 is an apocalyptic number.

It is an amenable number.

561456784 is an abundant number, since it is smaller than the sum of its proper divisors (700341424).

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

561456784 is a wasteful number, since it uses less digits than its factorization.

561456784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74903 (or 74897 counting only the distinct ones).

The product of its digits is 806400, while the sum is 46.

The square root of 561456784 is about 23695.0793203990. The cubic root of 561456784 is about 824.9711818523.

The spelling of 561456784 in words is "five hundred sixty-one million, four hundred fifty-six thousand, seven hundred eighty-four".