8219672081 has 16 divisors (see below), whose sum is σ = 8618736000. Its totient is φ = 7824187008.

The previous prime is 8219672051. The next prime is 8219672089. The reversal of 8219672081 is 1802769128.

It is a cyclic number.

It is not a de Polignac number, because 8219672081 - 2³⁰ = 7145930257 is a prime.

It is a super-2 number, since 2×8219672081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8219672089) 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 15 ways as a sum of consecutive naturals, for example, 7279925 + ... + 7281053.

It is an arithmetic number, because the mean of its divisors is an integer number (538671000).

Almost surely, 2^8219672081 is an apocalyptic number.

It is an amenable number.

8219672081 is a deficient number, since it is larger than the sum of its proper divisors (399063919).

8219672081 is a wasteful number, since it uses less digits than its factorization.

8219672081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 8219672081 is about 90662.4072093831. The cubic root of 8219672081 is about 2018.1409619914.

The spelling of 8219672081 in words is "eight billion, two hundred nineteen million, six hundred seventy-two thousand, eighty-one".