72169803817 has 8 divisors (see below), whose sum is σ = 73482507072. Its totient is φ = 70864028400.

The previous prime is 72169803787. The next prime is 72169803829. The reversal of 72169803817 is 71830896127.

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-72169803817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72169803887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1710934 + ... + 1752607.

It is an arithmetic number, because the mean of its divisors is an integer number (9185313384).

Almost surely, 2^72169803817 is an apocalyptic number.

It is an amenable number.

72169803817 is a deficient number, since it is larger than the sum of its proper divisors (1312703255).

72169803817 is a wasteful number, since it uses less digits than its factorization.

72169803817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463919.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 72169803817 in words is "seventy-two billion, one hundred sixty-nine million, eight hundred three thousand, eight hundred seventeen".