31663636344 has 192 divisors, whose sum is σ = 95829120000. Its totient is φ = 9675754560.

The previous prime is 31663636337. The next prime is 31663636349. The reversal of 31663636344 is 44363636613.

31663636344 is a `hidden beast` number, since 3 + 1 + 6 + 6 + 3 + 6 + 3 + 634 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 31663636344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31663636349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2410707 + ... + 2423805.

It is an arithmetic number, because the mean of its divisors is an integer number (499110000).

Almost surely, 2^31663636344 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 31663636344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47914560000).

31663636344 is an abundant number, since it is smaller than the sum of its proper divisors (64165483656).

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

31663636344 is a wasteful number, since it uses less digits than its factorization.

31663636344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13183 (or 13154 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 45.

The spelling of 31663636344 in words is "thirty-one billion, six hundred sixty-three million, six hundred thirty-six thousand, three hundred forty-four".