31279279268 has 24 divisors (see below), whose sum is σ = 57970080000. Its totient is φ = 14716761728.

The previous prime is 31279279267. The next prime is 31279279289. The reversal of 31279279268 is 86297297213.

It is not an unprimeable number, because it can be changed into a prime (31279279261) 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 7 ways as a sum of consecutive naturals, for example, 324533 + ... + 409731.

It is an arithmetic number, because the mean of its divisors is an integer number (2415420000).

Almost surely, 2^31279279268 is an apocalyptic number.

It is an amenable number.

31279279268 is a deficient number, since it is larger than the sum of its proper divisors (26690800732).

31279279268 is a wasteful number, since it uses less digits than its factorization.

31279279268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90619 (or 90617 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 56.

The spelling of 31279279268 in words is "thirty-one billion, two hundred seventy-nine million, two hundred seventy-nine thousand, two hundred sixty-eight".