31986206676 has 72 divisors (see below), whose sum is σ = 84504649320. Its totient is φ = 10188251136.

The previous prime is 31986206617. The next prime is 31986206687. The reversal of 31986206676 is 67660268913.

31986206676 is a `hidden beast` number, since 3 + 1 + 9 + 8 + 620 + 6 + 6 + 7 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6473811600 + 25512395076 = 80460^2 + 159726^2 .

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 23 ways as a sum of consecutive naturals, for example, 56661 + ... + 259196.

It is an arithmetic number, because the mean of its divisors is an integer number (1173675685).

Almost surely, 2^31986206676 is an apocalyptic number.

31986206676 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31986206676 is an abundant number, since it is smaller than the sum of its proper divisors (52518442644).

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

31986206676 is a wasteful number, since it uses less digits than its factorization.

31986206676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315993 (or 315988 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 31986206676 in words is "thirty-one billion, nine hundred eighty-six million, two hundred six thousand, six hundred seventy-six".