563151661 has 6 divisors (see below), whose sum is σ = 568568330. Its totient is φ = 557739648.

The previous prime is 563151653. The next prime is 563151671. The reversal of 563151661 is 166151365.

It can be written as a sum of positive squares in 3 ways, for example, as 368409636 + 194742025 = 19194^2 + 13955^2 .

It is not a de Polignac number, because 563151661 - 2³ = 563151653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563151671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 246621 + ... + 248893.

Almost surely, 2^563151661 is an apocalyptic number.

It is an amenable number.

563151661 is a deficient number, since it is larger than the sum of its proper divisors (5416669).

563151661 is an frugal number, since it uses more digits than its factorization.

563151661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655 (or 2382 counting only the distinct ones).

The product of its digits is 16200, while the sum is 34.

The square root of 563151661 is about 23730.8166947537. The cubic root of 563151661 is about 825.8004650847.

The spelling of 563151661 in words is "five hundred sixty-three million, one hundred fifty-one thousand, six hundred sixty-one".