72863120002 has 4 divisors (see below), whose sum is σ = 109294680006. Its totient is φ = 36431560000.

The previous prime is 72863119999. The next prime is 72863120021. The reversal of 72863120002 is 20002136827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41742984721 + 31120135281 = 204311^2 + 176409^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18215779999 + ... + 18215780002.

Almost surely, 2^72863120002 is an apocalyptic number.

72863120002 is a deficient number, since it is larger than the sum of its proper divisors (36431560004).

72863120002 is a wasteful number, since it uses less digits than its factorization.

72863120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36431560003.

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 72863120002 its reverse (20002136827), we get a palindrome (92865256829).

The spelling of 72863120002 in words is "seventy-two billion, eight hundred sixty-three million, one hundred twenty thousand, two".