28136643724570 has 8 divisors (see below), whose sum is σ = 50645958704244. Its totient is φ = 11254657489824.

The previous prime is 28136643724529. The next prime is 28136643724571. The reversal of 28136643724570 is 7542734663182.

It can be written as a sum of positive squares in 2 ways, for example, as 25788145709209 + 2348498015361 = 5078203^2 + 1532481^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28136643724571) 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, 1406832186219 + ... + 1406832186238.

Almost surely, 2^{28136643724570} is an apocalyptic number.

28136643724570 is a deficient number, since it is larger than the sum of its proper divisors (22509314979674).

28136643724570 is a wasteful number, since it uses less digits than its factorization.

28136643724570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813664372464.

The product of its (nonzero) digits is 40642560, while the sum is 58.

The spelling of 28136643724570 in words is "twenty-eight trillion, one hundred thirty-six billion, six hundred forty-three million, seven hundred twenty-four thousand, five hundred seventy".