8121618329 has 8 divisors (see below), whose sum is σ = 8860707072. Its totient is φ = 7382656240.

The previous prime is 8121618319. The next prime is 8121618331. The reversal of 8121618329 is 9238161218.

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 8121618329 - 2⁴ = 8121618313 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121618319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145592 + ... + 193494.

It is an arithmetic number, because the mean of its divisors is an integer number (1107588384).

Almost surely, 2^8121618329 is an apocalyptic number.

It is an amenable number.

8121618329 is a deficient number, since it is larger than the sum of its proper divisors (739088743).

8121618329 is a wasteful number, since it uses less digits than its factorization.

8121618329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63327.

The product of its digits is 41472, while the sum is 41.

The square root of 8121618329 is about 90120.0217987102. The cubic root of 8121618329 is about 2010.0839324538.

The spelling of 8121618329 in words is "eight billion, one hundred twenty-one million, six hundred eighteen thousand, three hundred twenty-nine".