1321643645060 has 12 divisors (see below), whose sum is σ = 2775451654668. Its totient is φ = 528657458016.

The previous prime is 1321643645029. The next prime is 1321643645087. The reversal of 1321643645060 is 605463461231.

It can be written as a sum of positive squares in 2 ways, for example, as 860768306176 + 460875338884 = 927776^2 + 678878^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321643644999 and 1321643645017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33041091107 + ... + 33041091146.

It is an arithmetic number, because the mean of its divisors is an integer number (231287637889).

Almost surely, 2^{1321643645060} is an apocalyptic number.

1321643645060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321643645060 is an abundant number, since it is smaller than the sum of its proper divisors (1453808009608).

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

1321643645060 is a wasteful number, since it uses less digits than its factorization.

1321643645060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66082182262 (or 66082182260 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 1321643645060 in words is "one trillion, three hundred twenty-one billion, six hundred forty-three million, six hundred forty-five thousand, sixty".