27500861745 has 64 divisors (see below), whose sum is σ = 55897536000. Its totient is φ = 12566700288.

The previous prime is 27500861669. The next prime is 27500861749. The reversal of 27500861745 is 54716800572.

27500861745 is a `hidden beast` number, since 27 + 5 + 0 + 0 + 8 + 617 + 4 + 5 = 666.

It is not a de Polignac number, because 27500861745 - 2¹⁰ = 27500860721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 27500861745.

It is not an unprimeable number, because it can be changed into a prime (27500861749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3274011 + ... + 3282399.

It is an arithmetic number, because the mean of its divisors is an integer number (873399000).

Almost surely, 2^27500861745 is an apocalyptic number.

It is an amenable number.

27500861745 is an abundant number, since it is smaller than the sum of its proper divisors (28396674255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27500861745 is a wasteful number, since it uses less digits than its factorization.

27500861745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11879 (or 11873 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 27500861745 in words is "twenty-seven billion, five hundred million, eight hundred sixty-one thousand, seven hundred forty-five".