31748871760 has 20 divisors (see below), whose sum is σ = 73816127028. Its totient is φ = 12699548672.

The previous prime is 31748871751. The next prime is 31748871761. The reversal of 31748871760 is 6717884713.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11814820416 + 19934051344 = 108696^2 + 141188^2 .

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 = 31748871698 and 31748871707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31748871761) 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, 198430369 + ... + 198430528.

Almost surely, 2^31748871760 is an apocalyptic number.

It is an amenable number.

31748871760 is an abundant number, since it is smaller than the sum of its proper divisors (42067255268).

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

31748871760 is a wasteful number, since it uses less digits than its factorization.

31748871760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396860910 (or 396860904 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 52.

The spelling of 31748871760 in words is "thirty-one billion, seven hundred forty-eight million, eight hundred seventy-one thousand, seven hundred sixty".