320450664312 has 96 divisors (see below), whose sum is σ = 889922888400. Its totient is φ = 104137684992.

The previous prime is 320450664311. The next prime is 320450664337. The reversal of 320450664312 is 213466054023.

320450664312 is a `hidden beast` number, since 3 + 2 + 0 + 4 + 5 + 0 + 6 + 643 + 1 + 2 = 666.

It is a super-2 number, since 2×320450664312² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320450664311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125514 + ... + 810342.

Almost surely, 2^320450664312 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 320450664312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444961444200).

320450664312 is an abundant number, since it is smaller than the sum of its proper divisors (569472224088).

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

320450664312 is a wasteful number, since it uses less digits than its factorization.

320450664312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685005 (or 684998 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 320450664312 in words is "three hundred twenty billion, four hundred fifty million, six hundred sixty-four thousand, three hundred twelve".