561995648 has 32 divisors (see below), whose sum is σ = 1122915960. Its totient is φ = 280165888.

The previous prime is 561995647. The next prime is 561995657. The reversal of 561995648 is 846599165.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 561995648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561995647) 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, 38090 + ... + 50742.

Almost surely, 2^561995648 is an apocalyptic number.

It is an amenable number.

561995648 is a deficient number, since it is larger than the sum of its proper divisors (560920312).

561995648 is a wasteful number, since it uses less digits than its factorization.

561995648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13014 (or 13002 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 53.

The square root of 561995648 is about 23706.4473930617. The cubic root of 561995648 is about 825.2350223589.

The spelling of 561995648 in words is "five hundred sixty-one million, nine hundred ninety-five thousand, six hundred forty-eight".