8065512261 has 12 divisors (see below), whose sum is σ = 11694485088. Its totient is φ = 5356561704.

The previous prime is 8065512239. The next prime is 8065512263. The reversal of 8065512261 is 1622155608.

8065512261 is a `hidden beast` number, since 80 + 6 + 5 + 512 + 2 + 61 = 666.

It is not a de Polignac number, because 8065512261 - 2²⁹ = 7528641349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8065512263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1701375 + ... + 1706108.

It is an arithmetic number, because the mean of its divisors is an integer number (974540424).

Almost surely, 2^8065512261 is an apocalyptic number.

It is an amenable number.

8065512261 is a deficient number, since it is larger than the sum of its proper divisors (3628972827).

8065512261 is a wasteful number, since it uses less digits than its factorization.

8065512261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407752 (or 3407749 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 8065512261 is about 89808.1970702007. The cubic root of 8065512261 is about 2005.4445202338. Note that the first 3 decimals are identical.

Adding to 8065512261 its reverse (1622155608), we get a palindrome (9687667869).

The spelling of 8065512261 in words is "eight billion, sixty-five million, five hundred twelve thousand, two hundred sixty-one".