561622690 has 8 divisors (see below), whose sum is σ = 1010920860. Its totient is φ = 224649072.

The previous prime is 561622687. The next prime is 561622697. The reversal of 561622690 is 96226165.

561622690 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 560316241 + 1306449 = 23671^2 + 1143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×561622690³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (561622697) 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, 28081125 + ... + 28081144.

Almost surely, 2^561622690 is an apocalyptic number.

561622690 is a deficient number, since it is larger than the sum of its proper divisors (449298170).

561622690 is a wasteful number, since it uses less digits than its factorization.

561622690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56162276.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 561622690 is about 23698.5799152607. The cubic root of 561622690 is about 825.0524313173.

The spelling of 561622690 in words is "five hundred sixty-one million, six hundred twenty-two thousand, six hundred ninety".