31308941664 has 720 divisors, whose sum is σ = 124680324384. Its totient is φ = 7499796480.

The previous prime is 31308941647. The next prime is 31308941687. The reversal of 31308941664 is 46614980313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 28539964 + ... + 28541060.

Almost surely, 2^31308941664 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 31308941664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62340162192).

31308941664 is an abundant number, since it is smaller than the sum of its proper divisors (93371382720).

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

31308941664 is a wasteful number, since it uses less digits than its factorization.

31308941664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 31308941664 in words is "thirty-one billion, three hundred eight million, nine hundred forty-one thousand, six hundred sixty-four".