72931287712 has 24 divisors (see below), whose sum is σ = 143749904256. Its totient is φ = 36423375552.

The previous prime is 72931287677. The next prime is 72931287721. The reversal of 72931287712 is 21778213927.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1292838 + ... + 1348069.

It is an arithmetic number, because the mean of its divisors is an integer number (5989579344).

Almost surely, 2^72931287712 is an apocalyptic number.

It is an amenable number.

72931287712 is a deficient number, since it is larger than the sum of its proper divisors (70818616544).

72931287712 is a wasteful number, since it uses less digits than its factorization.

72931287712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641780 (or 2641772 counting only the distinct ones).

The product of its digits is 592704, while the sum is 49.

The spelling of 72931287712 in words is "seventy-two billion, nine hundred thirty-one million, two hundred eighty-seven thousand, seven hundred twelve".