6311399985 has 128 divisors (see below), whose sum is σ = 13086904320. Its totient is φ = 2855001600.

The previous prime is 6311399977. The next prime is 6311400041. The reversal of 6311399985 is 5899931136.

It is not a de Polignac number, because 6311399985 - 2³ = 6311399977 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1398102 + ... + 1402608.

It is an arithmetic number, because the mean of its divisors is an integer number (102241440).

Almost surely, 2^6311399985 is an apocalyptic number.

It is an amenable number.

6311399985 is an abundant number, since it is smaller than the sum of its proper divisors (6775504335).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6311399985 is a wasteful number, since it uses less digits than its factorization.

6311399985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4596 (or 4590 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The square root of 6311399985 is about 79444.3200298171. The cubic root of 6311399985 is about 1848.0280897864.

The spelling of 6311399985 in words is "six billion, three hundred eleven million, three hundred ninety-nine thousand, nine hundred eighty-five".