561647472 has 20 divisors (see below), whose sum is σ = 1450922760. Its totient is φ = 187215808.

The previous prime is 561647459. The next prime is 561647477. The reversal of 561647472 is 274746165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561647477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5850447 + ... + 5850542.

It is an arithmetic number, because the mean of its divisors is an integer number (72546138).

Almost surely, 2^561647472 is an apocalyptic number.

It is an amenable number.

561647472 is an abundant number, since it is smaller than the sum of its proper divisors (889275288).

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

561647472 is a wasteful number, since it uses less digits than its factorization.

561647472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11701000 (or 11700994 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 561647472 is about 23699.1027678265. The cubic root of 561647472 is about 825.0645664803.

It can be divided in two parts, 56164 and 7472, that added together give a palindrome (63636).

The spelling of 561647472 in words is "five hundred sixty-one million, six hundred forty-seven thousand, four hundred seventy-two".