31375642444 has 24 divisors (see below), whose sum is σ = 55239589440. Its totient is φ = 15593174784.

The previous prime is 31375642427. The next prime is 31375642477. The reversal of 31375642444 is 44424657313.

It is a self number, because there is not a number n which added to its sum of digits gives 31375642444.

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 7 ways as a sum of consecutive naturals, for example, 432237 + ... + 499579.

It is an arithmetic number, because the mean of its divisors is an integer number (2301649560).

Almost surely, 2^31375642444 is an apocalyptic number.

It is an amenable number.

31375642444 is a deficient number, since it is larger than the sum of its proper divisors (23863946996).

31375642444 is a wasteful number, since it uses less digits than its factorization.

31375642444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68049 (or 68047 counting only the distinct ones).

The product of its digits is 967680, while the sum is 43.

The spelling of 31375642444 in words is "thirty-one billion, three hundred seventy-five million, six hundred forty-two thousand, four hundred forty-four".