31831640682768 has 120 divisors (see below), whose sum is σ = 89193220429248. Its totient is φ = 10597590372096.

The previous prime is 31831640682763. The next prime is 31831640682811. The reversal of 31831640682768 is 86728604613813.

31831640682768 is a `hidden beast` number, since 3 + 1 + 8 + 316 + 40 + 6 + 8 + 276 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (31831640682763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 483458746 + ... + 483524582.

Almost surely, 2^{31831640682768} is an apocalyptic number.

It is an amenable number.

31831640682768 is an abundant number, since it is smaller than the sum of its proper divisors (57361579746480).

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

31831640682768 is a wasteful number, since it uses less digits than its factorization.

31831640682768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69901 (or 69892 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 63.

The spelling of 31831640682768 in words is "thirty-one trillion, eight hundred thirty-one billion, six hundred forty million, six hundred eighty-two thousand, seven hundred sixty-eight".