561626090 has 8 divisors (see below), whose sum is σ = 1010926980. Its totient is φ = 224650432.

The previous prime is 561626083. The next prime is 561626113. The reversal of 561626090 is 90626165.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 463239529 + 98386561 = 21523^2 + 9919^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 561626090.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28081295 + ... + 28081314.

Almost surely, 2^561626090 is an apocalyptic number.

561626090 is a deficient number, since it is larger than the sum of its proper divisors (449300890).

561626090 is a wasteful number, since it uses less digits than its factorization.

561626090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56162616.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 561626090 is about 23698.6516494082. The cubic root of 561626090 is about 825.0540962385.

The spelling of 561626090 in words is "five hundred sixty-one million, six hundred twenty-six thousand, ninety".