3931715995648 has 144 divisors (see below), whose sum is σ = 9148448836800. Its totient is φ = 1684390256640.

The previous prime is 3931715995643. The next prime is 3931715995651. The reversal of 3931715995648 is 8465995171393.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3931715995643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 352330293 + ... + 352341451.

It is an arithmetic number, because the mean of its divisors is an integer number (63530894700).

Almost surely, 2^{3931715995648} 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 3931715995648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4574224418400).

3931715995648 is an abundant number, since it is smaller than the sum of its proper divisors (5216732841152).

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

3931715995648 is a wasteful number, since it uses less digits than its factorization.

3931715995648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14706 (or 14679 counting only the distinct ones).

The product of its digits is 220449600, while the sum is 70.

The spelling of 3931715995648 in words is "three trillion, nine hundred thirty-one billion, seven hundred fifteen million, nine hundred ninety-five thousand, six hundred forty-eight".