31378874368 has 28 divisors (see below), whose sum is σ = 62753934690. Its totient is φ = 15689433088.

The previous prime is 31378874333. The next prime is 31378874369. The reversal of 31378874368 is 86347887313.

It can be written as a sum of positive squares in only one way, i.e., 22370586624 + 9008287744 = 149568^2 + 94912^2 .

It is not an unprimeable number, because it can be changed into a prime (31378874369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1907023 + ... + 1923406.

Almost surely, 2^31378874368 is an apocalyptic number.

It is an amenable number.

31378874368 is a deficient number, since it is larger than the sum of its proper divisors (31375060322).

31378874368 is an frugal number, since it uses more digits than its factorization.

31378874368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830455 (or 3830431 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 58.

The spelling of 31378874368 in words is "thirty-one billion, three hundred seventy-eight million, eight hundred seventy-four thousand, three hundred sixty-eight".