27857142636193 has 8 divisors (see below), whose sum is σ = 30265486487208. Its totient is φ = 25486725460224.

The previous prime is 27857142636173. The next prime is 27857142636209. The reversal of 27857142636193 is 39163624175872.

It can be written as a sum of positive squares in 4 ways, for example, as 1459208432529 + 26397934203664 = 1207977^2 + 5137892^2 .

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 27857142636193 - 2¹³ = 27857142628001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27857142636163) 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, 9481667230 + ... + 9481670167.

It is an arithmetic number, because the mean of its divisors is an integer number (3783185810901).

Almost surely, 2^{27857142636193} is an apocalyptic number.

It is an amenable number.

27857142636193 is a deficient number, since it is larger than the sum of its proper divisors (2408343851015).

27857142636193 is a wasteful number, since it uses less digits than its factorization.

27857142636193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18963337523.

The product of its digits is 91445760, while the sum is 64.

The spelling of 27857142636193 in words is "twenty-seven trillion, eight hundred fifty-seven billion, one hundred forty-two million, six hundred thirty-six thousand, one hundred ninety-three".