27725520133 has 4 divisors (see below), whose sum is σ = 29356433100. Its totient is φ = 26094607168.

The previous prime is 27725520073. The next prime is 27725520161. The reversal of 27725520133 is 33102552772.

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 25944511329 + 1781008804 = 161073^2 + 42202^2 .

It is a cyclic number.

It is not a de Polignac number, because 27725520133 - 2¹⁷ = 27725389061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27725520092 and 27725520101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27725550133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815456458 + ... + 815456491.

It is an arithmetic number, because the mean of its divisors is an integer number (7339108275).

Almost surely, 2^27725520133 is an apocalyptic number.

It is an amenable number.

27725520133 is a deficient number, since it is larger than the sum of its proper divisors (1630912967).

27725520133 is a wasteful number, since it uses less digits than its factorization.

27725520133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630912966.

The product of its (nonzero) digits is 88200, while the sum is 37.

The spelling of 27725520133 in words is "twenty-seven billion, seven hundred twenty-five million, five hundred twenty thousand, one hundred thirty-three".