72163497275 has 6 divisors (see below), whose sum is σ = 89482736652. Its totient is φ = 57730797800.

The previous prime is 72163497269. The next prime is 72163497323. The reversal of 72163497275 is 57279436127.

It is a de Polignac number, because none of the positive numbers 2^k-72163497275 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1443269921 + ... + 1443269970.

It is an arithmetic number, because the mean of its divisors is an integer number (14913789442).

Almost surely, 2^72163497275 is an apocalyptic number.

72163497275 is a deficient number, since it is larger than the sum of its proper divisors (17319239377).

72163497275 is a wasteful number, since it uses less digits than its factorization.

72163497275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886539901 (or 2886539896 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 53.

The spelling of 72163497275 in words is "seventy-two billion, one hundred sixty-three million, four hundred ninety-seven thousand, two hundred seventy-five".