31682240314640 has 20 divisors (see below), whose sum is σ = 73661208731724. Its totient is φ = 12672896125824.

The previous prime is 31682240314607. The next prime is 31682240314649. The reversal of 31682240314640 is 4641304228613.

It can be written as a sum of positive squares in 2 ways, for example, as 23582251096336 + 8099989218304 = 4856156^2 + 2846048^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 31682240314591 and 31682240314600.

It is not an unprimeable number, because it can be changed into a prime (31682240314649) 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, 198014001887 + ... + 198014002046.

Almost surely, 2^{31682240314640} is an apocalyptic number.

It is an amenable number.

31682240314640 is an abundant number, since it is smaller than the sum of its proper divisors (41978968417084).

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

31682240314640 is a wasteful number, since it uses less digits than its factorization.

31682240314640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396028003946 (or 396028003940 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 31682240314640 in words is "thirty-one trillion, six hundred eighty-two billion, two hundred forty million, three hundred fourteen thousand, six hundred forty".