561426669 has 6 divisors (see below), whose sum is σ = 810949646. Its totient is φ = 374284440.

The previous prime is 561426661. The next prime is 561426673. The reversal of 561426669 is 966624165.

It can be written as a sum of positive squares in only one way, i.e., 398481444 + 162945225 = 19962^2 + 12765^2 .

It is not a de Polignac number, because 561426669 - 2³ = 561426661 is a prime.

It is a super-2 number, since 2×561426669² = 630399809328871122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561426661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31190362 + ... + 31190379.

Almost surely, 2^561426669 is an apocalyptic number.

It is an amenable number.

561426669 is a deficient number, since it is larger than the sum of its proper divisors (249522977).

561426669 is a wasteful number, since it uses less digits than its factorization.

561426669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62380747 (or 62380744 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 561426669 is about 23694.4438423863. The cubic root of 561426669 is about 824.9564318590.

The spelling of 561426669 in words is "five hundred sixty-one million, four hundred twenty-six thousand, six hundred sixty-nine".