72224036873 has 4 divisors (see below), whose sum is σ = 72225184068. Its totient is φ = 72222889680.

The previous prime is 72224036851. The next prime is 72224036879. The reversal of 72224036873 is 37863042227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54527854144 + 17696182729 = 233512^2 + 133027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72224036873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72224036879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473318 + ... + 607023.

It is an arithmetic number, because the mean of its divisors is an integer number (18056296017).

Almost surely, 2^72224036873 is an apocalyptic number.

It is an amenable number.

72224036873 is a deficient number, since it is larger than the sum of its proper divisors (1147195).

72224036873 is a wasteful number, since it uses less digits than its factorization.

72224036873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147194.

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 72224036873 in words is "seventy-two billion, two hundred twenty-four million, thirty-six thousand, eight hundred seventy-three".