31378491876 has 24 divisors (see below), whose sum is σ = 75195305920. Its totient is φ = 10176808032.

The previous prime is 31378491857. The next prime is 31378491883. The reversal of 31378491876 is 67819487313.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35335696 + ... + 35336583.

Almost surely, 2^31378491876 is an apocalyptic number.

It is an amenable number.

31378491876 is an abundant number, since it is smaller than the sum of its proper divisors (43816814044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31378491876 is a wasteful number, since it uses less digits than its factorization.

31378491876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70672323 (or 70672321 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 57.

The spelling of 31378491876 in words is "thirty-one billion, three hundred seventy-eight million, four hundred ninety-one thousand, eight hundred seventy-six".