27189638242 has 8 divisors (see below), whose sum is σ = 43921723356. Its totient is φ = 12549063792.

The previous prime is 27189638233. The next prime is 27189638243. The reversal of 27189638242 is 24283698172.

It can be written as a sum of positive squares in 2 ways, for example, as 25023759721 + 2165878521 = 158189^2 + 46539^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 27189638242.

It is not an unprimeable number, because it can be changed into a prime (27189638243) 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, 522877633 + ... + 522877684.

Almost surely, 2^27189638242 is an apocalyptic number.

27189638242 is a deficient number, since it is larger than the sum of its proper divisors (16732085114).

27189638242 is a wasteful number, since it uses less digits than its factorization.

27189638242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045755332.

The product of its digits is 2322432, while the sum is 52.

The spelling of 27189638242 in words is "twenty-seven billion, one hundred eighty-nine million, six hundred thirty-eight thousand, two hundred forty-two".