72538895197 has 8 divisors (see below), whose sum is σ = 74623387832. Its totient is φ = 70460928000.

The previous prime is 72538895189. The next prime is 72538895243. The reversal of 72538895197 is 79159883527.

It can be written as a sum of positive squares in 4 ways, for example, as 29305673721 + 43233221476 = 171189^2 + 207926^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72538895197 - 2³ = 72538895189 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 (72538815197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1608804 + ... + 1653277.

It is an arithmetic number, because the mean of its divisors is an integer number (9327923479).

Almost surely, 2^72538895197 is an apocalyptic number.

It is an amenable number.

72538895197 is a deficient number, since it is larger than the sum of its proper divisors (2084492635).

72538895197 is a wasteful number, since it uses less digits than its factorization.

72538895197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3262719.

The product of its digits is 38102400, while the sum is 64.

The spelling of 72538895197 in words is "seventy-two billion, five hundred thirty-eight million, eight hundred ninety-five thousand, one hundred ninety-seven".