1061116565 has 4 divisors (see below), whose sum is σ = 1273339884. Its totient is φ = 848893248.

The previous prime is 1061116561. The next prime is 1061116597. The reversal of 1061116565 is 5656111601.

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 605848996 + 455267569 = 24614^2 + 21337^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061116565 - 2² = 1061116561 is a prime.

It is a super-2 number, since 2×1061116565² = 2251936729034798450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061116561) 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, 106111652 + ... + 106111661.

It is an arithmetic number, because the mean of its divisors is an integer number (318334971).

Almost surely, 2^1061116565 is an apocalyptic number.

It is an amenable number.

1061116565 is a deficient number, since it is larger than the sum of its proper divisors (212223319).

1061116565 is an equidigital number, since it uses as much as digits as its factorization.

1061116565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212223318.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1061116565 is about 32574.7841896151. The cubic root of 1061116565 is about 1019.9707043361.

The spelling of 1061116565 in words is "one billion, sixty-one million, one hundred sixteen thousand, five hundred sixty-five".