31886133113868 has 48 divisors (see below), whose sum is σ = 81166025982720. Its totient is φ = 9662307019200.

The previous prime is 31886133113851. The next prime is 31886133113911. The reversal of 31886133113868 is 86831133168813.

It is a happy number.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6286698 + ... + 10163406.

It is an arithmetic number, because the mean of its divisors is an integer number (1690958874640).

Almost surely, 2^{31886133113868} is an apocalyptic number.

It is an amenable number.

31886133113868 is an abundant number, since it is smaller than the sum of its proper divisors (49279892868852).

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

31886133113868 is a wasteful number, since it uses less digits than its factorization.

31886133113868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939038 (or 3939036 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 60.

Subtracting 31886133113868 from its reverse (86831133168813), we obtain a palindrome (54945000054945).

The spelling of 31886133113868 in words is "thirty-one trillion, eight hundred eighty-six billion, one hundred thirty-three million, one hundred thirteen thousand, eight hundred sixty-eight".