8021680129 has 8 divisors (see below), whose sum is σ = 8940572640. Its totient is φ = 7152457536.

The previous prime is 8021680127. The next prime is 8021680153. The reversal of 8021680129 is 9210861208.

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 8021680129 - 2¹ = 8021680127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8021680127) 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, 12417139 + ... + 12417784.

It is an arithmetic number, because the mean of its divisors is an integer number (1117571580).

Almost surely, 2^8021680129 is an apocalyptic number.

It is an amenable number.

8021680129 is a deficient number, since it is larger than the sum of its proper divisors (918892511).

8021680129 is a wasteful number, since it uses less digits than its factorization.

8021680129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24834959.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 8021680129 is about 89563.8327060650. The cubic root of 8021680129 is about 2001.8050478277.

The spelling of 8021680129 in words is "eight billion, twenty-one million, six hundred eighty thousand, one hundred twenty-nine".