561286616 has 16 divisors (see below), whose sum is σ = 1148086440. Its totient is φ = 255130240.

The previous prime is 561286613. The next prime is 561286639. The reversal of 561286616 is 616682165.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561286613) 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, 3189041 + ... + 3189216.

Almost surely, 2^561286616 is an apocalyptic number.

It is an amenable number.

561286616 is an abundant number, since it is smaller than the sum of its proper divisors (586799824).

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

561286616 is a wasteful number, since it uses less digits than its factorization.

561286616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6378274 (or 6378270 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 561286616 is about 23691.4882605547. The cubic root of 561286616 is about 824.8878285203.

The spelling of 561286616 in words is "five hundred sixty-one million, two hundred eighty-six thousand, six hundred sixteen".