561327648 has 96 divisors (see below), whose sum is σ = 1687827456. Its totient is φ = 160013568.

The previous prime is 561327623. The next prime is 561327661. The reversal of 561327648 is 846723165.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458365 + ... + 459587.

It is an arithmetic number, because the mean of its divisors is an integer number (17581536).

Almost surely, 2^561327648 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 561327648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843913728).

561327648 is an abundant number, since it is smaller than the sum of its proper divisors (1126499808).

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

561327648 is a wasteful number, since it uses less digits than its factorization.

561327648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926 (or 1918 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 561327648 is about 23692.3542097445. The cubic root of 561327648 is about 824.9079287517.

The spelling of 561327648 in words is "five hundred sixty-one million, three hundred twenty-seven thousand, six hundred forty-eight".