72180796685 has 8 divisors (see below), whose sum is σ = 86858231040. Its totient is φ = 57583787344.

The previous prime is 72180796637. The next prime is 72180796711. The reversal of 72180796685 is 58669708127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72180796685 - 2¹² = 72180792589 is a prime.

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, 20104277 + ... + 20107866.

It is an arithmetic number, because the mean of its divisors is an integer number (10857278880).

Almost surely, 2^72180796685 is an apocalyptic number.

It is an amenable number.

72180796685 is a deficient number, since it is larger than the sum of its proper divisors (14677434355).

72180796685 is a wasteful number, since it uses less digits than its factorization.

72180796685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40212507.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 72180796685 in words is "seventy-two billion, one hundred eighty million, seven hundred ninety-six thousand, six hundred eighty-five".