72792730081 has 8 divisors (see below), whose sum is σ = 75155318784. Its totient is φ = 70458101280.

The previous prime is 72792730079. The next prime is 72792730103. The reversal of 72792730081 is 18003729727.

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 72792730081 - 2¹ = 72792730079 is a prime.

It is a super-2 number, since 2×72792730081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72792730001) 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, 6984685 + ... + 6995098.

It is an arithmetic number, because the mean of its divisors is an integer number (9394414848).

Almost surely, 2^72792730081 is an apocalyptic number.

It is an amenable number.

72792730081 is a deficient number, since it is larger than the sum of its proper divisors (2362588703).

72792730081 is a wasteful number, since it uses less digits than its factorization.

72792730081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13979951.

The product of its (nonzero) digits is 296352, while the sum is 46.

The spelling of 72792730081 in words is "seventy-two billion, seven hundred ninety-two million, seven hundred thirty thousand, eighty-one".