931385311811 has 16 divisors (see below), whose sum is σ = 1083210278400. Its totient is φ = 794354191488.

The previous prime is 931385311751. The next prime is 931385311853. The reversal of 931385311811 is 118113583139.

It is a cyclic number.

It is not a de Polignac number, because 931385311811 - 2¹⁰ = 931385310787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (931385311711) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 62678351 + ... + 62693208.

It is an arithmetic number, because the mean of its divisors is an integer number (67700642400).

Almost surely, 2^931385311811 is an apocalyptic number.

931385311811 is a deficient number, since it is larger than the sum of its proper divisors (151824966589).

931385311811 is a wasteful number, since it uses less digits than its factorization.

931385311811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125371618.

The product of its digits is 77760, while the sum is 44.

The spelling of 931385311811 in words is "nine hundred thirty-one billion, three hundred eighty-five million, three hundred eleven thousand, eight hundred eleven".