311866685774387 has 16 divisors (see below), whose sum is σ = 315828035228160. Its totient is φ = 307910229037152.

The previous prime is 311866685774351. The next prime is 311866685774393. The reversal of 311866685774387 is 783477586668113.

It is a cyclic number.

It is not a de Polignac number, because 311866685774387 - 2⁸ = 311866685774131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311866685774327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1433635814 + ... + 1433853332.

It is an arithmetic number, because the mean of its divisors is an integer number (19739252201760).

Almost surely, 2^{311866685774387} is an apocalyptic number.

311866685774387 is a deficient number, since it is larger than the sum of its proper divisors (3961349453773).

311866685774387 is a wasteful number, since it uses less digits than its factorization.

311866685774387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228682.

The product of its digits is 6827950080, while the sum is 80.

The spelling of 311866685774387 in words is "three hundred eleven trillion, eight hundred sixty-six billion, six hundred eighty-five million, seven hundred seventy-four thousand, three hundred eighty-seven".