31843035664 has 80 divisors (see below), whose sum is σ = 68793793344. Its totient is φ = 14275134720.

The previous prime is 31843035647. The next prime is 31843035673. The reversal of 31843035664 is 46653034813.

It is a self number, because there is not a number n which added to its sum of digits gives 31843035664.

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, 1544367 + ... + 1564849.

Almost surely, 2^31843035664 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 31843035664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34396896672).

31843035664 is an abundant number, since it is smaller than the sum of its proper divisors (36950757680).

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

31843035664 is a wasteful number, since it uses less digits than its factorization.

31843035664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20597 (or 20569 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 31843035664 in words is "thirty-one billion, eight hundred forty-three million, thirty-five thousand, six hundred sixty-four".