1320643106472 has 128 divisors (see below), whose sum is σ = 3509538278400. Its totient is φ = 412696747008.

The previous prime is 1320643106437. The next prime is 1320643106479. The reversal of 1320643106472 is 2746013460231.

It is a super-3 number, since 3×1320643106472³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320643106472.

It is not an unprimeable number, because it can be changed into a prime (1320643106479) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115163283 + ... + 115174749.

It is an arithmetic number, because the mean of its divisors is an integer number (27418267800).

Almost surely, 2^{1320643106472} is an apocalyptic number.

1320643106472 is a gapful number since it is divisible by the number (12) 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 1320643106472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1754769139200).

1320643106472 is an abundant number, since it is smaller than the sum of its proper divisors (2188895171928).

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

1320643106472 is a wasteful number, since it uses less digits than its factorization.

1320643106472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12575 (or 12571 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 1320643106472 in words is "one trillion, three hundred twenty billion, six hundred forty-three million, one hundred six thousand, four hundred seventy-two".