8081961569 has 8 divisors (see below), whose sum is σ = 8928289920. Its totient is φ = 7254234000.

The previous prime is 8081961523. The next prime is 8081961583. The reversal of 8081961569 is 9651691808.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8081961569 is a prime.

It is a super-2 number, since 2×8081961569² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8081961569.

It is not an unprimeable number, because it can be changed into a prime (8081991569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4649282 + ... + 4651019.

It is an arithmetic number, because the mean of its divisors is an integer number (1116036240).

Almost surely, 2^8081961569 is an apocalyptic number.

It is an amenable number.

8081961569 is a deficient number, since it is larger than the sum of its proper divisors (846328351).

8081961569 is a wasteful number, since it uses less digits than its factorization.

8081961569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9300391.

The product of its (nonzero) digits is 933120, while the sum is 53.

The square root of 8081961569 is about 89899.7306391960. The cubic root of 8081961569 is about 2006.8069372696.

The spelling of 8081961569 in words is "eight billion, eighty-one million, nine hundred sixty-one thousand, five hundred sixty-nine".