72320635081 has 8 divisors (see below), whose sum is σ = 72591292800. Its totient is φ = 72050412720.

The previous prime is 72320635061. The next prime is 72320635141. The reversal of 72320635081 is 18053602327.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72320635081 is a prime.

It is a super-3 number, since 3×72320635081³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72320635081.

It is not an unprimeable number, because it can be changed into a prime (72320635061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225936 + ... + 442366.

It is an arithmetic number, because the mean of its divisors is an integer number (9073911600).

Almost surely, 2^72320635081 is an apocalyptic number.

It is an amenable number.

72320635081 is a deficient number, since it is larger than the sum of its proper divisors (270657719).

72320635081 is a wasteful number, since it uses less digits than its factorization.

72320635081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217679.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 72320635081 in words is "seventy-two billion, three hundred twenty million, six hundred thirty-five thousand, eighty-one".