31578638852 has 12 divisors (see below), whose sum is σ = 55264097280. Its totient is φ = 15788896776.

The previous prime is 31578638827. The next prime is 31578638867. The reversal of 31578638852 is 25883687513.

It is an unprimeable number.

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, 112493 + ... + 275339.

It is an arithmetic number, because the mean of its divisors is an integer number (4605341440).

Almost surely, 2^31578638852 is an apocalyptic number.

It is an amenable number.

31578638852 is a deficient number, since it is larger than the sum of its proper divisors (23685458428).

31578638852 is a wasteful number, since it uses less digits than its factorization.

31578638852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211330 (or 211328 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 56.

The spelling of 31578638852 in words is "thirty-one billion, five hundred seventy-eight million, six hundred thirty-eight thousand, eight hundred fifty-two".