8061144565 has 4 divisors (see below), whose sum is σ = 9673373484. Its totient is φ = 6448915648.

The previous prime is 8061144563. The next prime is 8061144599. The reversal of 8061144565 is 5654411608.

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 3282602436 + 4778542129 = 57294^2 + 69127^2 .

It is a cyclic number.

It is not a de Polignac number, because 8061144565 - 2¹ = 8061144563 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8061144563) 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, 806114452 + ... + 806114461.

It is an arithmetic number, because the mean of its divisors is an integer number (2418343371).

Almost surely, 2^8061144565 is an apocalyptic number.

It is an amenable number.

8061144565 is a deficient number, since it is larger than the sum of its proper divisors (1612228919).

8061144565 is a wasteful number, since it uses less digits than its factorization.

8061144565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612228918.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 8061144565 is about 89783.8769768827. The cubic root of 8061144565 is about 2005.0824538078.

The spelling of 8061144565 in words is "eight billion, sixty-one million, one hundred forty-four thousand, five hundred sixty-five".