31814786689 has 27 divisors (see below), whose sum is σ = 37582719777. Its totient is φ = 26853508584.

The previous prime is 31814786669. The next prime is 31814786699. The reversal of 31814786689 is 98668741813.

The square root of 31814786689 is 178367.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 31814786689 - 2⁹ = 31814786177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31814786659) 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 26 ways as a sum of consecutive naturals, for example, 103631074 + ... + 103631380.

Almost surely, 2^31814786689 is an apocalyptic number.

31814786689 is the 178367-th square number.

31814786689 is the 89184-th centered octagonal number.

It is an amenable number.

31814786689 is a deficient number, since it is larger than the sum of its proper divisors (5767933088).

31814786689 is an frugal number, since it uses more digits than its factorization.

31814786689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 397 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 61.

The spelling of 31814786689 in words is "thirty-one billion, eight hundred fourteen million, seven hundred eighty-six thousand, six hundred eighty-nine".