72872165943 has 32 divisors (see below), whose sum is σ = 112866086400. Its totient is φ = 46468997784.

The previous prime is 72872165879. The next prime is 72872165953. The reversal of 72872165943 is 34956127827.

It is a happy number.

72872165943 is a `hidden beast` number, since 7 + 28 + 7 + 21 + 6 + 594 + 3 = 666.

It is not a de Polignac number, because 72872165943 - 2⁶ = 72872165879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72872165943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72872165953) 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 31 ways as a sum of consecutive naturals, for example, 217596 + ... + 439422.

It is an arithmetic number, because the mean of its divisors is an integer number (3527065200).

Almost surely, 2^72872165943 is an apocalyptic number.

72872165943 is a deficient number, since it is larger than the sum of its proper divisors (39993920457).

72872165943 is an equidigital number, since it uses as much as digits as its factorization.

72872165943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221905 (or 221853 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 72872165943 in words is "seventy-two billion, eight hundred seventy-two million, one hundred sixty-five thousand, nine hundred forty-three".