72228650873 has 4 divisors (see below), whose sum is σ = 76477395060. Its totient is φ = 67979906688.

The previous prime is 72228650827. The next prime is 72228650887. The reversal of 72228650873 is 37805682227.

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 29698662889 + 42529987984 = 172333^2 + 206228^2 .

It is a cyclic number.

It is not a de Polignac number, because 72228650873 - 2⁸ = 72228650617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72228656873) 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, 2124372068 + ... + 2124372101.

It is an arithmetic number, because the mean of its divisors is an integer number (19119348765).

Almost surely, 2^72228650873 is an apocalyptic number.

It is an amenable number.

72228650873 is a deficient number, since it is larger than the sum of its proper divisors (4248744187).

72228650873 is a wasteful number, since it uses less digits than its factorization.

72228650873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248744186.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 72228650873 in words is "seventy-two billion, two hundred twenty-eight million, six hundred fifty thousand, eight hundred seventy-three".