320669879191 has 4 divisors (see below), whose sum is σ = 320686252000. Its totient is φ = 320653506384.

The previous prime is 320669879161. The next prime is 320669879303. The reversal of 320669879191 is 191978966023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191978966023 = 13 ⋅14767612771.

It is a cyclic number.

It is not a de Polignac number, because 320669879191 - 2²⁵ = 320636324759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320669879161) 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 3 ways as a sum of consecutive naturals, for example, 8156991 + ... + 8196208.

It is an arithmetic number, because the mean of its divisors is an integer number (80171563000).

Almost surely, 2^320669879191 is an apocalyptic number.

320669879191 is a deficient number, since it is larger than the sum of its proper divisors (16372809).

320669879191 is a wasteful number, since it uses less digits than its factorization.

320669879191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16372808.

The product of its (nonzero) digits is 8817984, while the sum is 61.

The spelling of 320669879191 in words is "three hundred twenty billion, six hundred sixty-nine million, eight hundred seventy-nine thousand, one hundred ninety-one".