1320313464440 has 32 divisors (see below), whose sum is σ = 2980196394480. Its totient is φ = 526438079232.

The previous prime is 1320313464319. The next prime is 1320313464443. The reversal of 1320313464440 is 444643130231.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320313464440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320313464443) 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 7 ways as a sum of consecutive naturals, for example, 52715654 + ... + 52740693.

Almost surely, 2^{1320313464440} is an apocalyptic number.

1320313464440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320313464440 is an abundant number, since it is smaller than the sum of its proper divisors (1659882930040).

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

1320313464440 is a wasteful number, since it uses less digits than its factorization.

1320313464440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105456671 (or 105456667 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 1320313464440 its reverse (444643130231), we get a palindrome (1764956594671).

The spelling of 1320313464440 in words is "one trillion, three hundred twenty billion, three hundred thirteen million, four hundred sixty-four thousand, four hundred forty".