31678949128688 has 20 divisors (see below), whose sum is σ = 62536038729768. Its totient is φ = 15540616553280.

The previous prime is 31678949128681. The next prime is 31678949128699. The reversal of 31678949128688 is 88682194987613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31678949128681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18678624818 + ... + 18678626513.

Almost surely, 2^{31678949128688} is an apocalyptic number.

It is an amenable number.

31678949128688 is a deficient number, since it is larger than the sum of its proper divisors (30857089601080).

31678949128688 is a wasteful number, since it uses less digits than its factorization.

31678949128688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37357251392 (or 37357251386 counting only the distinct ones).

The product of its digits is 2006581248, while the sum is 80.

The spelling of 31678949128688 in words is "thirty-one trillion, six hundred seventy-eight billion, nine hundred forty-nine million, one hundred twenty-eight thousand, six hundred eighty-eight".