1311033320978 has 16 divisors (see below), whose sum is σ = 1971657870336. Its totient is φ = 653814369600.

The previous prime is 1311033320977. The next prime is 1311033321011. The reversal of 1311033320978 is 8790233301131.

It is not an unprimeable number, because it can be changed into a prime (1311033320977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8183675 + ... + 8342337.

It is an arithmetic number, because the mean of its divisors is an integer number (123228616896).

Almost surely, 2^{1311033320978} is an apocalyptic number.

1311033320978 is a deficient number, since it is larger than the sum of its proper divisors (660624549358).

1311033320978 is a wasteful number, since it uses less digits than its factorization.

1311033320978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169369.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 1311033320978 in words is "one trillion, three hundred eleven billion, thirty-three million, three hundred twenty thousand, nine hundred seventy-eight".