31087678012 has 12 divisors (see below), whose sum is σ = 54404799120. Its totient is φ = 15543449696.

The previous prime is 31087678007. The next prime is 31087678021. The reversal of 31087678012 is 21087678013.

It is a self number, because there is not a number n which added to its sum of digits gives 31087678012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155064 + ... + 293632.

It is an arithmetic number, because the mean of its divisors is an integer number (4533733260).

Almost surely, 2^31087678012 is an apocalyptic number.

It is an amenable number.

31087678012 is a deficient number, since it is larger than the sum of its proper divisors (23317121108).

31087678012 is a wasteful number, since it uses less digits than its factorization.

31087678012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194660 (or 194658 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

Subtracting from 31087678012 its reverse (21087678013), we obtain a palindrome (9999999999).

The spelling of 31087678012 in words is "thirty-one billion, eighty-seven million, six hundred seventy-eight thousand, twelve".