31766845656 has 128 divisors (see below), whose sum is σ = 98658362880. Its totient is φ = 8299708416.

The previous prime is 31766845639. The next prime is 31766845657. The reversal of 31766845656 is 65654866713.

It is a junction number, because it is equal to n+sod(n) for n = 31766845596 and 31766845605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31766845657) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 165720 + ... + 301656.

It is an arithmetic number, because the mean of its divisors is an integer number (770768460).

Almost surely, 2^31766845656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31766845656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49329181440).

31766845656 is an abundant number, since it is smaller than the sum of its proper divisors (66891517224).

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

31766845656 is a wasteful number, since it uses less digits than its factorization.

31766845656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136073 (or 136069 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 57.

The spelling of 31766845656 in words is "thirty-one billion, seven hundred sixty-six million, eight hundred forty-five thousand, six hundred fifty-six".