6400311111 has 24 divisors (see below), whose sum is σ = 9425445120. Its totient is φ = 4183647936.

The previous prime is 6400311053. The next prime is 6400311143. The reversal of 6400311111 is 1111130046.

6400311111 is a `hidden beast` number, since 640 + 0 + 3 + 1 + 11 + 11 = 666.

It is not a de Polignac number, because 6400311111 - 2⁹ = 6400310599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400311311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 949210 + ... + 955928.

It is an arithmetic number, because the mean of its divisors is an integer number (392726880).

Almost surely, 2^6400311111 is an apocalyptic number.

6400311111 is a deficient number, since it is larger than the sum of its proper divisors (3025134009).

6400311111 is a wasteful number, since it uses less digits than its factorization.

6400311111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8775 (or 8772 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 6400311111 is about 80001.9444201202. The cubic root of 6400311111 is about 1856.6656173190.

Adding to 6400311111 its reverse (1111130046), we get a palindrome (7511441157).

The spelling of 6400311111 in words is "six billion, four hundred million, three hundred eleven thousand, one hundred eleven".