72196904189 has 4 divisors (see below), whose sum is σ = 76443780924. Its totient is φ = 67950027456.

The previous prime is 72196904173. The next prime is 72196904191. The reversal of 72196904189 is 98140969127.

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 59170562500 + 13026341689 = 243250^2 + 114133^2 .

It is a cyclic number.

It is not a de Polignac number, because 72196904189 - 2⁴ = 72196904173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72196904149) 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, 2123438342 + ... + 2123438375.

It is an arithmetic number, because the mean of its divisors is an integer number (19110945231).

Almost surely, 2^72196904189 is an apocalyptic number.

It is an amenable number.

72196904189 is a deficient number, since it is larger than the sum of its proper divisors (4246876735).

72196904189 is a wasteful number, since it uses less digits than its factorization.

72196904189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246876734.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The spelling of 72196904189 in words is "seventy-two billion, one hundred ninety-six million, nine hundred four thousand, one hundred eighty-nine".