320656232275740 has 144 divisors (see below), whose sum is σ = 985862394316800. Its totient is φ = 84349398466944.

The previous prime is 320656232275739. The next prime is 320656232275759. The reversal of 320656232275740 is 47572232656023.

320656232275740 is a `hidden beast` number, since 3 + 2 + 0 + 6 + 5 + 62 + 3 + 2 + 2 + 7 + 574 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5462691 + ... + 25906629.

It is an arithmetic number, because the mean of its divisors is an integer number (6846266627200).

Almost surely, 2^{320656232275740} is an apocalyptic number.

320656232275740 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 320656232275740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492931197158400).

320656232275740 is an abundant number, since it is smaller than the sum of its proper divisors (665206162041060).

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

320656232275740 is a wasteful number, since it uses less digits than its factorization.

320656232275740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20445136 (or 20445131 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 54.

The spelling of 320656232275740 in words is "three hundred twenty trillion, six hundred fifty-six billion, two hundred thirty-two million, two hundred seventy-five thousand, seven hundred forty".