562611661 has 4 divisors (see below), whose sum is σ = 562815324. Its totient is φ = 562408000.

The previous prime is 562611659. The next prime is 562611683. The reversal of 562611661 is 166116265.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 271260900 + 291350761 = 16470^2 + 17069^2 .

It is a cyclic number.

It is not a de Polignac number, because 562611661 - 2¹ = 562611659 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 (562611611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97630 + ... + 103231.

It is an arithmetic number, because the mean of its divisors is an integer number (140703831).

Almost surely, 2^562611661 is an apocalyptic number.

It is an amenable number.

562611661 is a deficient number, since it is larger than the sum of its proper divisors (203663).

562611661 is a wasteful number, since it uses less digits than its factorization.

562611661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203662.

The product of its digits is 12960, while the sum is 34.

The square root of 562611661 is about 23719.4363550233. The cubic root of 562611661 is about 825.5364303133.

The spelling of 562611661 in words is "five hundred sixty-two million, six hundred eleven thousand, six hundred sixty-one".