72008733073 has 8 divisors (see below), whose sum is σ = 74372425128. Its totient is φ = 69682264704.

The previous prime is 72008733047. The next prime is 72008733079. The reversal of 72008733073 is 37033780027.

It can be written as a sum of positive squares in 4 ways, for example, as 18653276929 + 53355456144 = 136577^2 + 230988^2 .

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-72008733073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72008733079) 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, 9301990 + ... + 9309727.

It is an arithmetic number, because the mean of its divisors is an integer number (9296553141).

Almost surely, 2^72008733073 is an apocalyptic number.

72008733073 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

72008733073 is a deficient number, since it is larger than the sum of its proper divisors (2363692055).

72008733073 is a wasteful number, since it uses less digits than its factorization.

72008733073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18611843.

The product of its (nonzero) digits is 148176, while the sum is 40.

The spelling of 72008733073 in words is "seventy-two billion, eight million, seven hundred thirty-three thousand, seventy-three".