1320644551302 has 96 divisors (see below), whose sum is σ = 3079031765472. Its totient is φ = 407592041472.

The previous prime is 1320644551301. The next prime is 1320644551307. The reversal of 1320644551302 is 2031554460231.

1320644551302 is a `hidden beast` number, since 1 + 3 + 2 + 0 + 644 + 5 + 5 + 1 + 3 + 0 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320644551301) 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 47 ways as a sum of consecutive naturals, for example, 15477468 + ... + 15562560.

It is an arithmetic number, because the mean of its divisors is an integer number (32073247557).

Almost surely, 2^{1320644551302} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320644551302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1539515882736).

1320644551302 is an abundant number, since it is smaller than the sum of its proper divisors (1758387214170).

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

1320644551302 is a wasteful number, since it uses less digits than its factorization.

1320644551302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85942 (or 85939 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 1320644551302 in words is "one trillion, three hundred twenty billion, six hundred forty-four million, five hundred fifty-one thousand, three hundred two".