321920994263 has 8 divisors (see below), whose sum is σ = 351269829120. Its totient is φ = 292586041080.

The previous prime is 321920994259. The next prime is 321920994359. The reversal of 321920994263 is 362499029123.

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 321920994263 - 2² = 321920994259 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 (321920994163) 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, 3421895 + ... + 3514712.

It is an arithmetic number, because the mean of its divisors is an integer number (43908728640).

Almost surely, 2^321920994263 is an apocalyptic number.

321920994263 is a deficient number, since it is larger than the sum of its proper divisors (29348834857).

321920994263 is a wasteful number, since it uses less digits than its factorization.

321920994263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6940837.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 321920994263 in words is "three hundred twenty-one billion, nine hundred twenty million, nine hundred ninety-four thousand, two hundred sixty-three".