321069971992 has 72 divisors (see below), whose sum is σ = 764044460460. Its totient is φ = 125077700160.

The previous prime is 321069971983. The next prime is 321069971993. The reversal of 321069971992 is 299179960123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321069971993) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 37203934 + ... + 37212562.

Almost surely, 2^321069971992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321069971992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382022230230).

321069971992 is an abundant number, since it is smaller than the sum of its proper divisors (442974488468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321069971992 is an frugal number, since it uses more digits than its factorization.

321069971992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17289 (or 8649 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 58.

The spelling of 321069971992 in words is "three hundred twenty-one billion, sixty-nine million, nine hundred seventy-one thousand, nine hundred ninety-two".