27545730273 has 6 divisors (see below), whose sum is σ = 39788277074. Its totient is φ = 18363820176.

The previous prime is 27545730259. The next prime is 27545730293. The reversal of 27545730273 is 37203754572.

It is a happy number.

27545730273 is a `hidden beast` number, since 2 + 7 + 5 + 4 + 573 + 0 + 2 + 73 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25034517729 + 2511212544 = 158223^2 + 50112^2 .

It is not a de Polignac number, because 27545730273 - 2¹⁰ = 27545729249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27545730203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1530318340 + ... + 1530318357.

Almost surely, 2^27545730273 is an apocalyptic number.

It is an amenable number.

27545730273 is a deficient number, since it is larger than the sum of its proper divisors (12242546801).

27545730273 is a wasteful number, since it uses less digits than its factorization.

27545730273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060636703 (or 3060636700 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 45.

The spelling of 27545730273 in words is "twenty-seven billion, five hundred forty-five million, seven hundred thirty thousand, two hundred seventy-three".