311112185672 has 12 divisors (see below), whose sum is σ = 583338306195. Its totient is φ = 155555304024.

The previous prime is 311112185653. The next prime is 311112185689. The reversal of 311112185672 is 276581211113.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 155556092836 + 155556092836 = 394406^2 + 394406^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=394406.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1479023 + ... + 1676225.

Almost surely, 2^311112185672 is an apocalyptic number.

It is an amenable number.

311112185672 is a deficient number, since it is larger than the sum of its proper divisors (272226120523).

311112185672 is an frugal number, since it uses more digits than its factorization.

311112185672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394412 (or 197205 counting only the distinct ones).

The product of its digits is 20160, while the sum is 38.

Adding to 311112185672 its reverse (276581211113), we get a palindrome (587693396785).

The spelling of 311112185672 in words is "three hundred eleven billion, one hundred twelve million, one hundred eighty-five thousand, six hundred seventy-two".