31706027680 has 24 divisors (see below), whose sum is σ = 74905490772. Its totient is φ = 12682411008.

The previous prime is 31706027663. The next prime is 31706027687. The reversal of 31706027680 is 8672060713.

It can be written as a sum of positive squares in 2 ways, for example, as 30985856784 + 720170896 = 176028^2 + 26836^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (31706027687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99081177 + ... + 99081496.

Almost surely, 2^31706027680 is an apocalyptic number.

It is an amenable number.

31706027680 is an abundant number, since it is smaller than the sum of its proper divisors (43199463092).

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

31706027680 is a wasteful number, since it uses less digits than its factorization.

31706027680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198162688 (or 198162680 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 31706027680 in words is "thirty-one billion, seven hundred six million, twenty-seven thousand, six hundred eighty".