320856421129 has 8 divisors (see below), whose sum is σ = 328710066048. Its totient is φ = 313004103840.

The previous prime is 320856421099. The next prime is 320856421139. The reversal of 320856421129 is 921124658023.

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 320856421129 - 2⁵ = 320856421097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320856421139) 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, 166404 + ... + 818170.

It is an arithmetic number, because the mean of its divisors is an integer number (41088758256).

Almost surely, 2^320856421129 is an apocalyptic number.

It is an amenable number.

320856421129 is a deficient number, since it is larger than the sum of its proper divisors (7853644919).

320856421129 is a wasteful number, since it uses less digits than its factorization.

320856421129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663815.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 320856421129 in words is "three hundred twenty billion, eight hundred fifty-six million, four hundred twenty-one thousand, one hundred twenty-nine".