31321480648 has 32 divisors (see below), whose sum is σ = 60426810360. Its totient is φ = 15209233920.

The previous prime is 31321480643. The next prime is 31321480693. The reversal of 31321480648 is 84608412313.

It can be written as a sum of positive squares in 4 ways, for example, as 31307055844 + 14424804 = 176938^2 + 3798^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31321480648.

It is not an unprimeable number, because it can be changed into a prime (31321480643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62340 + ... + 257932.

Almost surely, 2^31321480648 is an apocalyptic number.

It is an amenable number.

31321480648 is a deficient number, since it is larger than the sum of its proper divisors (29105329712).

31321480648 is a wasteful number, since it uses less digits than its factorization.

31321480648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196177 (or 196173 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 31321480648 in words is "thirty-one billion, three hundred twenty-one million, four hundred eighty thousand, six hundred forty-eight".