31683534064 has 120 divisors (see below), whose sum is σ = 77466948048. Its totient is φ = 12442106880.

The previous prime is 31683534059. The next prime is 31683534131. The reversal of 31683534064 is 46043538613.

It is a self number, because there is not a number n which added to its sum of digits gives 31683534064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1384959 + ... + 1407649.

Almost surely, 2^31683534064 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 31683534064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38733474024).

31683534064 is an abundant number, since it is smaller than the sum of its proper divisors (45783413984).

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

31683534064 is a wasteful number, since it uses less digits than its factorization.

31683534064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22863 (or 22850 counting only the distinct ones).

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

The spelling of 31683534064 in words is "thirty-one billion, six hundred eighty-three million, five hundred thirty-four thousand, sixty-four".