561523464 has 96 divisors (see below), whose sum is σ = 1619275320. Its totient is φ = 175177728.

The previous prime is 561523463. The next prime is 561523471. The reversal of 561523464 is 464325165.

561523464 is a `hidden beast` number, since 5 + 615 + 2 + 34 + 6 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 462680100 + 98843364 = 21510^2 + 9942^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (561523463) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 235044 + ... + 237420.

Almost surely, 2^561523464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561523464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809637660).

561523464 is an abundant number, since it is smaller than the sum of its proper divisors (1057751856).

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

561523464 is a wasteful number, since it uses less digits than its factorization.

561523464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599 (or 2592 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 561523464 is about 23696.4863218157. The cubic root of 561523464 is about 825.0038391006.

The spelling of 561523464 in words is "five hundred sixty-one million, five hundred twenty-three thousand, four hundred sixty-four".