8065505521 has 8 divisors (see below), whose sum is σ = 8179545600. Its totient is φ = 7951561632.

The previous prime is 8065505479. The next prime is 8065505543. The reversal of 8065505521 is 1255055608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8065505521 - 2⁹ = 8065505009 is a prime.

It is a super-3 number, since 3×8065505521³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8065502521) 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 7 ways as a sum of consecutive naturals, for example, 154080 + ... + 199678.

It is an arithmetic number, because the mean of its divisors is an integer number (1022443200).

Almost surely, 2^8065505521 is an apocalyptic number.

It is an amenable number.

8065505521 is a deficient number, since it is larger than the sum of its proper divisors (114040079).

8065505521 is a wasteful number, since it uses less digits than its factorization.

8065505521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48095.

The product of its (nonzero) digits is 60000, while the sum is 37.

The square root of 8065505521 is about 89808.1595457785. The cubic root of 8065505521 is about 2005.4439616126.

The spelling of 8065505521 in words is "eight billion, sixty-five million, five hundred five thousand, five hundred twenty-one".