321132915840 has 576 divisors, whose sum is σ = 1195453284480. Its totient is φ = 73255649280.

The previous prime is 321132915821. The next prime is 321132915869. The reversal of 321132915840 is 48519231123.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 67138089 + ... + 67142871.

It is an arithmetic number, because the mean of its divisors is an integer number (2075439730).

Almost surely, 2^321132915840 is an apocalyptic number.

321132915840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321132915840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597726642240).

321132915840 is an abundant number, since it is smaller than the sum of its proper divisors (874320368640).

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

321132915840 is a wasteful number, since it uses less digits than its factorization.

321132915840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861 (or 4821 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 321132915840 in words is "three hundred twenty-one billion, one hundred thirty-two million, nine hundred fifteen thousand, eight hundred forty".