561077730 has 24 divisors (see below), whose sum is σ = 1458802332. Its totient is φ = 149620704.

The previous prime is 561077729. The next prime is 561077767. The reversal of 561077730 is 37770165.

561077730 is a `hidden beast` number, since 5 + 610 + 7 + 7 + 7 + 30 = 666.

561077730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 519976809 + 41100921 = 22803^2 + 6411^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3117009 + ... + 3117188.

Almost surely, 2^561077730 is an apocalyptic number.

561077730 is an abundant number, since it is smaller than the sum of its proper divisors (897724602).

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

561077730 is a wasteful number, since it uses less digits than its factorization.

561077730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234210 (or 6234207 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 36.

The square root of 561077730 is about 23687.0793894055. The cubic root of 561077730 is about 824.7854869278.

The spelling of 561077730 in words is "five hundred sixty-one million, seventy-seven thousand, seven hundred thirty".