71680037972 has 24 divisors (see below), whose sum is σ = 126471930984. Its totient is φ = 35545682432.

The previous prime is 71680037921. The next prime is 71680037981. The reversal of 71680037972 is 27973008617.

It can be written as a sum of positive squares in 4 ways, for example, as 175138756 + 71504899216 = 13234^2 + 267404^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71680037972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541538 + ... + 660774.

It is an arithmetic number, because the mean of its divisors is an integer number (5269663791).

Almost surely, 2^71680037972 is an apocalyptic number.

It is an amenable number.

71680037972 is a deficient number, since it is larger than the sum of its proper divisors (54791893012).

71680037972 is a wasteful number, since it uses less digits than its factorization.

71680037972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120475 (or 120473 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 50.

The spelling of 71680037972 in words is "seventy-one billion, six hundred eighty million, thirty-seven thousand, nine hundred seventy-two".