321920040959 has 8 divisors (see below), whose sum is σ = 352719063120. Its totient is φ = 291376612800.

The previous prime is 321920040929. The next prime is 321920040971. The reversal of 321920040959 is 959040029123.

It is a happy number.

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 321920040959 - 2¹⁶ = 321919975423 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 (321920040929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63895862 + ... + 63900899.

It is an arithmetic number, because the mean of its divisors is an integer number (44089882890).

Almost surely, 2^321920040959 is an apocalyptic number.

321920040959 is a deficient number, since it is larger than the sum of its proper divisors (30799022161).

321920040959 is a wasteful number, since it uses less digits than its factorization.

321920040959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127797001.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 321920040959 in words is "three hundred twenty-one billion, nine hundred twenty million, forty thousand, nine hundred fifty-nine".