1320644551300 has 36 divisors (see below), whose sum is σ = 2866834983040. Its totient is φ = 528066796320.

The previous prime is 1320644551231. The next prime is 1320644551301. The reversal of 1320644551300 is 31554460231.

It is not an unprimeable number, because it can be changed into a prime (1320644551301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2109720 + ... + 2663119.

Almost surely, 2^{1320644551300} is an apocalyptic number.

1320644551300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320644551300 is an abundant number, since it is smaller than the sum of its proper divisors (1546190431740).

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

1320644551300 is a wasteful number, since it uses less digits than its factorization.

1320644551300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775620 (or 4775613 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 1320644551300 in words is "one trillion, three hundred twenty billion, six hundred forty-four million, five hundred fifty-one thousand, three hundred".