1311796440385 has 32 divisors (see below), whose sum is σ = 1664262230400. Its totient is φ = 989853696000.

The previous prime is 1311796440359. The next prime is 1311796440397. The reversal of 1311796440385 is 5830446971131.

It is not a de Polignac number, because 1311796440385 - 2¹⁵ = 1311796407617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54946231 + ... + 54970099.

It is an arithmetic number, because the mean of its divisors is an integer number (52008194700).

Almost surely, 2^{1311796440385} is an apocalyptic number.

It is an amenable number.

1311796440385 is a deficient number, since it is larger than the sum of its proper divisors (352465790015).

1311796440385 is a wasteful number, since it uses less digits than its factorization.

1311796440385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26401.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 1311796440385 in words is "one trillion, three hundred eleven billion, seven hundred ninety-six million, four hundred forty thousand, three hundred eighty-five".