8078319681 has 8 divisors (see below), whose sum is σ = 10783239744. Its totient is φ = 5379473040.

The previous prime is 8078319679. The next prime is 8078319757. The reversal of 8078319681 is 1869138708.

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

It is not a de Polignac number, because 8078319681 - 2¹ = 8078319679 is a prime.

It is a super-2 number, since 2×8078319681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8078319611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1515250 + ... + 1520571.

It is an arithmetic number, because the mean of its divisors is an integer number (1347904968).

Almost surely, 2^8078319681 is an apocalyptic number.

It is an amenable number.

8078319681 is a deficient number, since it is larger than the sum of its proper divisors (2704920063).

8078319681 is a wasteful number, since it uses less digits than its factorization.

8078319681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036711.

The product of its (nonzero) digits is 580608, while the sum is 51.

The square root of 8078319681 is about 89879.4730792298. The cubic root of 8078319681 is about 2006.5054566571.

The spelling of 8078319681 in words is "eight billion, seventy-eight million, three hundred nineteen thousand, six hundred eighty-one".