1321776313276 has 24 divisors (see below), whose sum is σ = 2323268740800. Its totient is φ = 657991606272.

The previous prime is 1321776313271. The next prime is 1321776313283. The reversal of 1321776313276 is 6723136771231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321776313271) 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, 36780 + ... + 1626316.

It is an arithmetic number, because the mean of its divisors is an integer number (96802864200).

Almost surely, 2^{1321776313276} is an apocalyptic number.

It is an amenable number.

1321776313276 is a deficient number, since it is larger than the sum of its proper divisors (1001492427524).

1321776313276 is a wasteful number, since it uses less digits than its factorization.

1321776313276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590453 (or 1590451 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 49.

The spelling of 1321776313276 in words is "one trillion, three hundred twenty-one billion, seven hundred seventy-six million, three hundred thirteen thousand, two hundred seventy-six".