31878442048 has 14 divisors (see below), whose sum is σ = 63258783566. Its totient is φ = 15939220992.

The previous prime is 31878442033. The next prime is 31878442061. The reversal of 31878442048 is 84024487813.

It can be written as a sum of positive squares in only one way, i.e., 31431034944 + 447407104 = 177288^2 + 21152^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31878441992 and 31878442010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249050265 + ... + 249050392.

Almost surely, 2^31878442048 is an apocalyptic number.

It is an amenable number.

31878442048 is a deficient number, since it is larger than the sum of its proper divisors (31380341518).

31878442048 is an equidigital number, since it uses as much as digits as its factorization.

31878442048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498100669 (or 498100659 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 49.

The spelling of 31878442048 in words is "thirty-one billion, eight hundred seventy-eight million, four hundred forty-two thousand, forty-eight".