8081540079 has 8 divisors (see below), whose sum is σ = 10775802240. Its totient is φ = 5387485656.

The previous prime is 8081540059. The next prime is 8081540081. The reversal of 8081540079 is 9700451808.

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

It is not a de Polignac number, because 8081540079 - 2⁹ = 8081539567 is a prime.

It is a super-2 number, since 2×8081540079² (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 8081540079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8081540059) 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, 123582 + ... + 177300.

It is an arithmetic number, because the mean of its divisors is an integer number (1346975280).

Almost surely, 2^8081540079 is an apocalyptic number.

8081540079 is a deficient number, since it is larger than the sum of its proper divisors (2694262161).

8081540079 is a wasteful number, since it uses less digits than its factorization.

8081540079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103869.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 8081540079 is about 89897.3863858121. The cubic root of 8081540079 is about 2006.7720503693.

The spelling of 8081540079 in words is "eight billion, eighty-one million, five hundred forty thousand, seventy-nine".